Gynocare capsules, is a polyherbal formulation, are used as uterine tonic and for treating gynaecological ailments like infertility, leucorrhea, and menstrual disorders. The formulation contains ingredients of herbal origin, such as, extracts of Ashoka, Vasaka, Durva, Chandan, Musk, and so on. It was evaluated for its safety at the therapeutic dose level by a repeated dose oral toxicity study in albino Wistar rats. The herbal formulation was administered orally at a therapeutic dose of 100 mg/kg/day, for 90 days. All animals were monitored daily for their health status and signs of abnormalities. The body weight, water consumption, and food intake were measured once weekly. At the end of the experimental period, various hematological and biochemical parameters were estimated and histopathologies of selected organs were conducted. The study resulted from the long-term oral administration of Gynocare capsules (100 mg/kg), did not cause any relevant signs of toxicity nor significant changes in the physical, hematological and biochemical parameters. However, statistically significant differences were seen in the relative organ weights of adrenal gland, ovary, and serum creatinine levels. The reduction in ovary weight revealed the possibility of the drug targeting the ovary. Moreover, no pathological features were identified in the treated group as monitored by the histopathological analysis of the internal organs. The study established that Gynocare capsules at the dose given (100 mg/kg) did not induce any remarkable or significant toxic effects, indicating that it was safe in rats following oral administration for 90 consecutive days.
Polyherbal formulation; repeated dose oral toxicity; sub-chronic oral toxicity
OBJECTIVE: To examine existing evidence and inform family physicians about issues concerning herbal product use in Canada. QUALITY OF EVIDENCE: The Canadian Food and Drug Act and findings of an Expert Advisory Committee on Herbs and Botanical Preparations were consulted to provide an overview of the issues regarding herbal product regulation in Canada. Case reports of herbal toxicity were identified to illustrate some of the hazards of herbal products, and references provided to guide health professional in searching the literature for clinical trials that evaluate these drugs' efficacy. MAIN FINDINGS: Herbal products not registered as drugs in Canada are sold as foods and are exempt from the drug review process that evaluates product efficacy and safety. This places the public at risk of unwanted effects from the use of herbal products that are adulterated with other substances and of forgoing effective conventional therapy. Moreover, consumers are exposed to a plethora of information portraying herbal products as harmless. Some progress has been made to address these concerns by facilitating the registration of herbal products as drugs. CONCLUSIONS: Most herbal products that were evaluated were unsafe or ineffective, or no information was available to evaluate their efficacy. Despite the perception that herbal products are innocuous, family physicians need to be aware that herbal therapy can be harmful in order to help their patients make informed choices.
In the present study, the effect of essential oil of the root of Angelica archangelica Linn. was evaluated against electrically and chemically induced seizures. The seizures were induced in mice by maximal electroshock and pentylenetetrazol. The effect of essential oil of the root of Angelica archangelica on seizures was compared with standard anticonvulsant agents, phenytoin and diazepam. The essential oil of the root of Angelica archangelica suppressed duration of tonic convulsions and showed recovery in maximal electroshock induced seizures while it delayed time of onset of clonic convulsions and showed mortality protection in pentylenetetrazol induced seizures. The essential oil of the root of Angelica archangelica also produced motor impairment at the antiseizure doses. The study indicated that the essential oil exhibited antiseizure effect. The antiseizure effect may be attributed to the presence of terpenes in the essential oil.
Angelica archangelica (Umbelliferae); convulsions; pentylenetetrazol; medicinal plants; maximal electroshock
The use of herbal remedies had increased significantly in the last one decade in Nigeria. This has led to the production of herbal products with bogus claims. The microbial quality and antibacterial properties of two Nigerian herbal remedies with such claimed efficacy of curing all manners of microbial diseases were assessed. The herbal remedies were discovered to be contaminated with the following microorganisms: Bacillus subtilis, Bacillus coagulans, Bacillus cereus, Basidiobotrytis sp, Oedocephalum sp, Varicosporium sp and Articulospora inflata. Antibacterial analysis using the killing rate revealed that the herbal remedies had bacteriostatic and not bacteriocidal effect. Qualitative phytochemical screening of the herbal remedies revealed the presence of saponin, tannins, alkaloids, anthraquinone and cardiac glycosides which suggest possible antimicrobial effect. However, the presence of microbial contaminants in the herbal remedies suggests that they may serve as source of infection to end users.
Microbial; load; antibacterial; herbal; remedies
More than 15 million people in the United States consume herbal remedies or high-dose vitamins. The number of visits to providers of complementary and alternative medicine exceeds those to primary care physicians, for annual out-of-pocket costs of $30 billion. Use of herbal products forms the bulk of treatments, particularly by elderly persons who also consume multiple prescription medications for comorbid conditions, which increases the risk of adverse herb-drug-disease interactions. Despite the paucity of scientific evidence supporting the safety or efficacy of herbal products, their widespread promotion in the popular media and the unsubstantiated health care claims about their efficacy drive consumer demand. In this review, we highlight commonly used herbs and their interactions with cardiovascular drugs. We also discuss health-related issues of herbal products and suggest ways to improve their safety to better protect the public from untoward effects.
cardiovascular agents; complementary therapies; drug approval; herbal medicine; herb-drug interaction
The herbal preparation DAS-77, used for the treatment of various ailments in Nigeria, contains the milled bark of Mangifera indica L. and root of Carica papaya L. Toxicological assessment of the preparation was carried out in this study.
In the acute toxicity study, DAS-77 was administered to mice p.o. up to 20 g/kg in divided doses and i.p. at 250–3000 mg/kg. Mortality within 24 h was recorded. In the chronic toxicity study, rats were treated p.o. for 90 days at doses of 80, 400 (therapeutic dose, TD) and 2000 mg/kg. By 90 days, animals were sacrificed and blood samples collected for hematological and biochemical analysis. Organs were harvested for weight determination, antioxidants and histopathological assessments.
DAS-77 did not produce any lethality administered p.o. up to 20 g/kg in divided doses but the i.p. LD50 was 1122.0 mg/kg. At TD, DAS-77 produced significant (p < 0.05) reductions in body weight, food intake and K+, and increases in ovary weight, neutrophils and HDL, which were reversible. Histopathological presentations were generally normal. Effects at the other doses were comparable to those at TD except for reversible increases in antioxidants in the liver, kidney and testes, and sperm abnormality, and reductions in liver enzymes, sperm motility and count.
Findings in this study revealed that DAS-77 is relatively safe with the potential for enhancing in vivo antioxidant activity. However, possibly reversible side-effects include electrolyte imbalance and sterility in males.
DAS-77; Herbal preparation; Toxicological assessment; Acute toxicity; Chronic toxicity
The increase of herbal medicine use led many scientists to contribute to the research in this field. Also a few pharmacologists, after an initial phase of correct criticisms, today recognize the possibility of investigating the scientific value of medicinal products composed essentially of vegetable extracts. However, it is logical to pose the questions: (i) is there a role for the pharmacologist in herbal medicine (or phytotherapy)? (ii) can we do without pharmacologists’? First, two worlds—drug researchers (pharmacologists) and herbal medicines—yesterday appearing in opposition, are today closer and it is not unusual to read scientific works describing herbal extracts in journals traditionally dedicated to the study of synthetic drugs. Second, clinical application of herbal medicines is evaluable through the methods of modern clinical pharmacology. Efficacy and safety of medicinal plants represent naturally the object of interest for the pharmacologist and it is surely this aspect which gives the most important information on herbal medicine use. Many plants have been studied and results published showing, one time good or another poor, efficacy. Safety aspects of some of the most frequently used plants are now well known. For example, today we learn to use hypericum and we do not give it to patients taking other drugs because the interactions of hypericum with them. Contraindications of other plants, often represented by interactions with drugs, are finally known (Ginkgo biloba and drugs acting on blood coagulation). In conclusion, antagonistic behavior of pharmacologists versus herbal medicines is not useful. On the contrary, modern phytotherapy needs the contribution of researchers usually trained to evaluate efficacy and safety of medicinals.
herbal medicines; herbal medicine; herbs; medicinal plants; phytotherapy
The aim of this study is pharmacochemistry of Iranian flora Artemisia sieberi and its antimalarial effects on Plasmodium berghei in vivo. This is the first application of A. sieberi for treatment of murine malaria. A. sieberi were collected at flowering stage from the Khorassan and Semnan provinces of Iran; the aerial parts were air-dried at room temperature and then powdered. The powder was macerated in methanol, filtered with Bokhner hopper and solvent was separated in rotary evaporator. Total herbal extract was subsequently processed for ether and chloroform extracts preparation. The toxicity of herbal extract was assessed on naive NMRI mice with high, average and low doses; then pathophysiological signs were assessed. Finally, the antimalarial efficacy was investigated on two groups of Plasmodium berghei infected mice. Percentage of parasitaemia and pathophysiology were also evaluated. The results of this assessment showed no toxicity even by high concentration of herbal extract. A significant reduction in percentage of parasitaemia was observed; no alterations of hepatosplenomegaly and body weight were indicated in study group. A. sieberi extracts showed antimalarial effects against murine malaria with some efficacies on reducing pathophysiology. However, there is requirement to find the major component of this herbal extract by further studies.
Over three-quarter of the world's population is using herbal medicines with an increasing trend globally. Herbal medicines may be beneficial but are not completely harmless.
This study aimed to assess the extent of use and the general knowledge of the benefits and safety of herbal medicines among urban residents in Lagos, Nigeria.
The study involved 388 participants recruited by cluster and random sampling techniques. Participants were interviewed with a structured open- and close-ended questionnaire.
The information obtained comprises the demography and types of herbal medicines used by the respondents; indications for their use; the sources, benefits and adverse effects of the herbal medicines they used.
A total of 12 herbal medicines (crude or refined) were used by the respondents, either alone or in combination with other herbal medicines. Herbal medicines were reportedly used by 259 (66.8%) respondents. 'Agbo jedi-jedi' (35%) was the most frequently used herbal medicine preparation, followed by 'agbo-iba' (27.5%) and Oroki herbal mixture® (9%). Family and friends had a marked influence on 78.4% of the respondents who used herbal medicine preparations. Herbal medicines were considered safe by half of the respondents despite 20.8% of those who experienced mild to moderate adverse effects.
Herbal medicine is popular among the respondents but they appear to be ignorant of its potential toxicities. It may be necessary to evaluate the safety, efficacy and quality of herbal medicines and their products through randomised clinical trial studies. Public enlightenment programme about safe use of herbal medicines may be necessary as a means of minimizing the potential adverse effects.
In Mexico, local empirical knowledge about medicinal properties of plants is the basis for their use as home remedies. It is generally accepted by many people in Mexico and elsewhere in the world that beneficial medicinal effects can be obtained by ingesting plant products. In this review, we focus on the potential pharmacologic bases for herbal plant efficacy, but we also raise concerns about the safety of these agents, which have not been fully assessed. Although numerous randomized clinical trials of herbal medicines have been published and systematic reviews and meta-analyses of these studies are available, generalizations about the efficacy and safety of herbal medicines are clearly not possible. Recent publications have also highlighted the unintended consequences of herbal product use, including morbidity and mortality. It has been found that many phytochemicals have pharmacokinetic or pharmacodynamic interactions with drugs. The present review is limited to some herbal medicine that are native or cultivated in Mexico and that have significant use. We discuss the cultural uses, phytochemistry, pharmacological and toxicological properties of the following following plant species: Nopal (Opuntia ficus), Peppermint (Mentha piperita), Chaparral (Larrea divaricata), Dandlion (Taraxacum officinale), Mullein (Verbascum densiflorum), Chamomile (Matricaria recutita), Nettle or Stinging Nettle (Urtica dioica), Passionflower (Passiflora incarmata), Linden Flower (Tilia europea), and Aloa (Aloa vera). We conclude that our knowledge of the therapeutic benefits and risks of some herbal medicines used in Mexico is still limited and efforts to elucidate them should be intensified.
Osteoporosis is a growing worldwide problem, with the greatest burden resulting from fractures. Nevertheless, the majority of fractures in adults occur in those with "osteopenia" (bone mineral density (BMD) only moderately lower than young normal individuals). Since long-term drug therapy is an expensive option with uncertain consequences and side effects, natural herbal therapy offers an attractive alternative. The purpose of this study is to evaluate the effect on BMD and safety of the Classic Yin and Yang Tonic Formula for treatment of osteopenia and to investigate the mechanism by which this efficacy is achieved.
We propose a multicenter double-blind randomized placebo-controlled trial to evaluate the efficacy and safety of the Classic Yin and Yang Tonic Formula for the treatment of osteopenia. Participants aged 55 to 75 with low bone mineral density (T-score between -1 and -2.5) and kidney deficiency in TCM will be included and randomly allocated into two groups: treatment group and control group. Participants in the treatment group will be treated with Classic Yin and Yang Tonic Granule, while the controlled group will receive placebo. Primary outcome measure will be BMD of the lumbar spine and proximal femur using dual-energy X-ray absorptiometry. Secondary outcomes will include pain intensity measured with visual analogue scales, quality of life, serum markers of bone metabolism, indices of Neuro-endocrino-immune network and safety.
If the Classic Yin and Yang Tonic Formula can increase bone mass without adverse effects, it may be a novel strategy for the treatment of osteoporosis. Furthermore, the mechanism of the Chinese medical formula for osteoporosis will be partially elucidated.
This study is registered at ClinicalTrials.gov, NCT01271647.
Interest in herbal treatments has increased without data on safety, efficacy, or rates of use in pregnancy. We examined antenatal herbal and natural product use among mothers of nonmalformed infants in five geographic centers.
We used data on nonmalformed infants from the Slone Epidemiology Center’s case-control surveillance program for birth defects to examine rates and predictors of herbal use. Exposures were identified through maternal interview. In addition to overall use, five categories based on traditional uses and two natural product categories were created; topical products and herbal-containing mulitivitamins were excluded.
Among 4,866 mothers of nonmalformed infants, 282 (5.8%) reported use of herbal or natural treatments. Use varied by study center, and increased with increasing age.
Although rates of use are low, there remains a need for investigation of the safety of these products. Given sparse data on efficacy, even small risks might well outweigh benefits.
complementary medicine; drug safety; herbal treatments; pregnancy
Herbal products have gained increasing popularity in the last decade, and are now used by approximately 20% of the population. Herbal products are complex mixtures of organic chemicals that may come from any raw or processed part of a plant, including leaves, stems, flowers, roots, and seeds. Under the current law, herbs are defined as dietary supplements, and manufacturers can therefore produce, sell, and market herbs without first demonstrating safety and efficacy, as is required for pharmaceutical drugs. Although herbs are often perceived as “natural” and therefore safe, many different side effects have been reported owing to active ingredients, contaminants, or interactions with drugs.
Unfortunately, there is limited scientific evidence to establish the safety and efficacy of most herbal products. Of the top 10 herbs, 5 (ginkgo, garlic, St. John’s wort, soy, and kava) have scientific evidence suggesting efficacy, but concerns over safety and a consideration of other medical therapies may temper the decision to use these products.
Herbal products are not likely to become an important alternative to standard medical therapies unless there are changes to the regulation, standardization, and funding for research of these products.
herbal medicine; efficacy; safety; regulation
A “reverse pharmacology” approach to developing an anti-malarial phytomedicine was designed and implemented in Mali, resulting in a new standardized herbal anti-malarial after six years of research. The first step was to select a remedy for development, through a retrospective treatment-outcome study. The second step was a dose-escalating clinical trial that showed a dose-response phenomenon and helped select the safest and most efficacious dose. The third step was a randomized controlled trial to compare the phytomedicine to the standard first-line treatment. The last step was to identify active compounds which can be used as markers for standardization and quality control. This example of “reverse pharmacology” shows that a standardized phytomedicine can be developed faster and more cheaply than conventional drugs. Even if both approaches are not fully comparable, their efficiency in terms of public health and their complementarity should be thoroughly considered.
Food allergy is a common and serious health problem. A new herbal product, called food allergy herbal formula 2 (FAHF-2), has been demonstrated to have a high safety profile and potent long-term efficacy in a murine model of peanut-induced anaphylaxis.
To evaluate the safety and tolerability of FAHF-2 in patients with food allergy.
In this randomized, double-blinded, placebo-controlled, dose escalation, phase 1 trial, patients received 1 of 3 doses of FAHF-2 or placebo: 2.2 g (4 tablets), 3.3 g (6 tablets), or 6.6 g (12 tablets) 3 times a day for 7 days. Four active and 2 placebo patients were treated at each dose level. Vital signs, physical examination results, laboratory data, pulmonary function test results, and electrocardiogram data were monitored. Immunomodulatory studies were also performed.
Nineteen food allergic participants were included in the study. Two patients (1 in the FAHF-2 group and 1 in the placebo group) reported mild gastrointestinal symptoms. One patient withdrew from the study because of an allergic reaction that was unlikely related to the study medication. No significant differences were found in vital signs, physical examination results, laboratory data, pulmonary function test results, and electrocardiogram data obtained before and after treatment visits. Significantly decreased interleukin (IL) 5 levels were found in the active treatment group after 7 days. In vitro studies of peripheral blood mononuclear cells cultured with FAHF-2 also demonstrated a significant decrease in IL-5 and an increase in culture supernatant interferon γ and IL-10 levels.
FAHF-2 appeared to be safe and well tolerated in patients with food allergy.
Women who are diagnosed with breast cancer often self-administer complementary and alternative medicines to augment their conventional treatments, improve health, or prevent recurrence. Flor-Essence® herbal tonic is a complex mixture of eight herbal extracts used by cancer patients because of anecdotal evidence that it can treat or prevent disease. In this study four experimental groups of female MMTV-Neu mice were left untreated or treated with 3% Flor-Essence® in utero, from birth until 5 weeks of age, or throughout their lifetime. Palpable mammary tumor incidence and body weight was determined weekly for each group. The mice were sacrificed at 28 weeks of age and mammary tumors were enumerated to determine average tumor incidence and multiplicity for each group. Female mice exposed to Flor-Essence® herbal tonic in utero weighed significantly more than the control group (p < 0.001). The average tumor incidence and tumor multiplicity in the experimental mice treated with Flor-Essence® herbal tonic did not differ from the control animals. Flor-Essence® does not inhibit mammary tumor incidence or mammary tumor multiplicity in MMTV-Neu transgenic mice. Flor-Essence® exposure in utero causes increased body weight in experimental animals. This conclusion challenges widely available anecdotal information as well as the hopes of the consumer that this product will inhibit or suppress tumor development.
Flor-Essence® herbal tonic is a complex mixture of eight herbal extracts often used by women with breast cancer in hopes that it will help cure disease or prevent recurrence. There is currently very little scientific data to support or refute its self-administration. We tested whether Flor-Essence® would influence tumor development in the mammary glands of a mouse model of Her2/neu breast cancer. The tonic was given at different life stages to determine if timing of the exposure influenced the response to treatment. This report shows that Flor-Essence® did not inhibit mammary tumor development in the treated mice challenging anecdotal information, as well as the hopes of the consumer, that this product will inhibit or suppress tumor development. This report also shows that Flor-Essence® exposure in utero causes increased body weight in experimental animals.
complementary and alternative medicine; MMTV-Neu; herbal tonic; mammary tumors; transgenic; mouse; dietary supplement; essiac
Two-dimensional gel electrophoresis of shock fluids of Escherichia coli K-12 revealed the presence of a periplasmic protein related to sn-glycerol-3-phosphate transport (GLPT) that is under the regulation of glpR, the regulatory gene of the glp regulon. Mutants selected for their resistance to phosphonomycin and found to be defective in sn-glycerol-3-phosphate transport either did not produce GLPT or produced it in reduced amounts. Other mutations exhibited no apparent effect of GLPT. Transductions of glpT+ nalA phage P1 into these mutants and selection for growth on sn-glycerol-3-phosphate revealed a 50% cotransduction frequency to nalA. Reversion of mutants taht did not produce GLPT to growth on sn-glycerol-3-phosphate resulted in strains that produce GLPT. This suggests a close relationship of GLPT to the glpT gene and to sn-glycerol-3-phosphate transport. Attempts to demonstrate binding activity of GLPT in crude shock fluid towards sn-glycerol-3-phosphate have failed so far. However, all shock fluids, independent of their GLPT content, exhibited an enzymatic activity that hydrolyzes under the conditions of the binding assay, 30 to 60% of the sn-glycerol-3-phosphate to glycerol and inorganic orthophosphate.
The use of herbal medicines among pregnant women in Nigeria has not been widely studied.
Opinion of 595 pregnant women in three geopolitical zones in Nigeria on the use of herbal medicines, safety on usage, knowledge of potential effects of herbal remedies on the fetus and potential benefits or harms that may be derived from combining herbal remedies with conventional therapies were obtained using a structured questionnaire between September 2007 and March 2008. Descriptive statistics and Fisher's exact tests were used at 95% confidence level to evaluate the data obtained. Level of significance was set at p < 0.05.
More than two-third of respondents [67.5%] had used herbal medicines in crude forms or as pharmaceutical prepackaged dosage forms, with 74.3% preferring self-prepared formulations. Almost 30% who were using herbal medicine at the time of the study believed that the use of herbal medicines during pregnancy is safe. Respondents' reasons for taking herbal medications were varied and included reasons such as herbs having better efficacy than conventional medicines [22.4%], herbs being natural, are safer to use during pregnancy than conventional medicines [21.1%], low efficacy of conventional medicines [19.7%], easier access to herbal medicines [11.2%], traditional and cultural belief in herbal medicines to cure many illnesses [12.5%], and comparatively low cost of herbal medicines [5.9%].
Over half the respondents, 56.6% did not support combining herbal medicines with conventional drugs to forestall drug-herb interaction. About 33.4% respondents believed herbal medicines possess no adverse effects while 181 [30.4%] were of the opinion that adverse/side effects of some herbal medicines could be dangerous. Marital status, geopolitical zones, and educational qualification of respondents had statistically significant effects on respondents views on side effects of herbal medicines [p < 0.05)] while only geopolitical zones and educational qualifications seemed to have influence on respondents' opinion on the harmful effects of herbal medicines to the fetus [p < 0.05].
The study emphasized the wide spread use of herbal medicines by pregnant women in Nigeria highlighting an urgent need for health care practitioners and other health care givers to be aware of this practice and make efforts in obtaining information about herb use during ante-natal care. This will help forestall possible interaction between herbal and conventional medicines.
γ-Aminobutyric acid type A receptors (GABAA-Rs) have been implicated in mediating some of the behavioral effects of ethanol (EtOH), but the contribution of specific GABAA-R subunits is not fully understood. The GABAA-R α4 subunit often partners with β2/3 and δ subunits to form extrasynaptic GABAA-Rs that mediate tonic inhibition. Several in vitro studies have suggested that these extrasynaptic GABAA-Rs may be particularly relevant to the intoxicating effects of low doses of EtOH. In α4 subunit knockout mice tonic inhibition was greatly reduced, as were the potentiating effects of EtOH. We therefore hypothesized that those behavioral responses to EtOH that are mediated by α4-containing GABAA-Rs would be diminished in α4 knockout mice.
We investigated behavioral responses to acute administration of moderate/high dose EtOH or pentylenetetrazol in α4 subunit knockout mice. We compared behavioral responses to EtOH in α4 knockout and wild type littermates in the elevated plus maze (0.0, 1.0 g/kg EtOH), screen test (1.5, 2.0 g/kg), hypothermia (1.5, 2.0 g/kg), fixed speed rotarod (1.5, 2.0. 2.5 g/kg), open field (0.0, 1.0, 2.0 g/kg), radiant tail flick (2.0 g/kg), loss of righting reflex (3.5 g/kg), and EtOH metabolism and clearance assays. Sensitivity to pentylenetetrazol-induced seizures was also analyzed.
No differences were observed between α4 knockout mice and wild type controls in terms of the baseline behavior in the absence of EtOH treatment or in the behavioral effects of EtOH in the assays tested. In contrast, α4 knockout mice were significantly more sensitive to pentylenetetrazol-induced seizures.
We conclude that GABAA-Rs containing the α4 subunit are not absolutely required for the acute behavioral responses to moderate/high dose EtOH that were assessed with the elevated plus maze, screen test, hypothermia, fixed speed rotarod, open field, radiant tail flick, and loss of right reflex assays. We further suggest that these findings are complicated by the demonstrated compensatory alterations in synaptic GABAA-R EtOH sensitivity and function in α4 knockout mice.
GABA; GABA type A receptor; gene knockout mice; alcohol; extrasynaptic receptors
An herbal extract mixture and yogurt added to the herbal extract mixture were tested for their protective and therapeutic effects on ethanol-induced liver injury. The herbal extract mixture, yogurt and commercial drugs were used for treatment for two weeks prior to administering a single oral dose of ethanol (3 g/kg body weight). The herbal extract mixture and yogurt added to the herbal extract mixture were found to provide protection against ethanol-induced toxicity comparable to the commercial drug treatment, according to the serum and histopathological analysis. It was also shown that co-treatment with herbal extract mixture and yogurt against a triple oral dose of ethanol (2 g/kg body weight, over one week) provided protection against ethanol toxicity. After the initial set of experiments, the herbal extract mixture and yogurt treatments were extended for three more weeks. When compared to the positive control, further treatment with both the herbal extract and yogurt significantly reduced liver injury and resulted in a lower grade of lipid deposition.
ethanol-induced toxicity; herbal extract mixture; protective effect; rat; yogurt
In this study, to assess whether aqueous and ethanol fractions of Angelica keiskei induce acute skin irritation and phototoxicity, acute skin irritancy and phototoxicity tests were performed. The skin of rabbits or guinea pigs was treated with these fractions (100 mg/dose) and whether the animals sustained significant skin damage was determined. The data demonstrated that the aqueous and ethanol fractions of Angelica keiskei did not induce acute toxicity in the skin of the animals, as assessed by anatomical and pathological observations. The results from the present study suggest that these aqueous and ethanol fractions of Angelica keiskei have promising potential uses as cosmetic ingredients that do not induce significant levels of skin irritation or phototoxicity.
Angelica keiskei; skin irritancy; phototoxicity; fraction
There is growing concern that serious interactions are occurring between prescribed/over the counter and herbal medicines and that there is a lack of disclosure of herbal use by patients to doctors. This study explores women's perspectives about the safety of herbal remedies, herb-drug interactions and communication with doctors about herbal medicines.
Qualitative, cross-sectional study, with purposive sampling which took place in Cheshire, UK. Eighteen in depth semi-structured interviews were conducted with female herbal medicine users aged 18 years and above.
The large majority did not inform their GPs of their use of herbal medicines. This was due to lack of physician enquiry, perception of importance and fear of a negative response. Several women were not aware that herbal remedies could interact with prescribed or over the counter medicines. Of the women who had experienced adverse effects none had reported them, believing them of low importance.
The women had little knowledge about herb-drug interactions and rarely disclosed use of herbal medicines to their doctor. Doctors' communication and openness regarding herbal medicines needs to improve and there should be increased access to accurate information on herbal medicines in the public and health care domain.
Purpose of review
Allergic disorders represent serious public health problem in children. The chronic nature of these diseases and the fear of known side effects of synthetic drugs influence many families to seek complementary and alternative medicine (CAM). This review focuses on TCM herbal products, acupuncture for treating paediatric allergies.
Given the general safety profile, reputed efficacy, TCM are well received by the general population. However, compared to the long human use history and popularity of use of TCM, research into its efficacy and safety is still in infancy. Recent 2-3 years there are more controlled studies of TCM for allergic asthma, allergic rhinitis. Several publications including ours indicate that some TCM herbal formulas are safe and produced some levels of efficacy. Some herbal formula also showed beneficial immunomodualtory effects. Several preclinical studies demonstrated that the food allergy herbal formula-2 (FAHF-2) was effective in protecting against peanut anaphylaxis in animal model. Two TCM products have entered the clinical trials in the US for treating asthma and food allergy respectively. Both of these trials include children.
Recently studies indicate that TCM therapy including herbal medicines and acupuncture for allergic disorders in children is safe. There are also promising clinical and objective improvement. More controlled clinical studies are encouraged.
Complementary and Alternative Medicine; traditional Chinese medicine; acupuncture; allergic disorders in children; Th1 and Th2 balance
To examine common herbal supplements, explore potential risks associated with herbal use, and provide recommendations to the athletic trainer regarding patient care issues.
We searched MEDLINE, SPORT Discus, CINAHL, and Academic Search Elite databases 1990–2000 using the key words herbals, regulation, supplements, toxicity, and adulteration.
The use of herbal products continues to grow. While the origins of some medications and herbal supplements are similar, clinical testing and understanding of most herbal remedies is lacking. Some herbal products may prove useful in an athletic setting; however, current United States Food and Drug Administration (FDA) regulations do not ensure safe and effective products. A descriptive review focusing on specific considerations for the athletic trainer is provided.
Despite their increasing tendency to seek natural therapies, athletes need to be aware that “natural” does not equal “safe.” Athletes are entitled to know that most herbs are not proven safe or effective under current FDA standards. The athletic trainer must be able to provide honest, unbiased information when educating athletes regarding herbal supplements.
herbals; botanicals; toxicity; adulteration; regulation
The use of herbal dietary supplements in the United States is rapidly growing and it is crucial that the quality and safety of these preparations be ensured. To date, it is still a challenge to determine the mechanisms of toxicity induced by mixtures containing many chemical components, such as herbal dietary supplements. We previously proposed that analyses of the gene expression profiles using microarrays in the livers of rodents treated with herbal dietary supplements is a potentially practical approach for understanding the mechanism of toxicity. In this study, we utilized microarrays to analyze gene expression changes in the livers of male B6C3F1 mice administered Ginkgo biloba leaf extract (GBE) by gavage for two years, and to determine pathways and mechanisms associated with GBE treatments. Analysis of 31,802 genes revealed that there were 129, 289, and 2011 genes significantly changed in the 300, 600, and 2,000 mg/kg treatment groups, respectively, when compared with control animals. Drug metabolizing genes were significantly altered in response to GBE treatments. Pathway and network analyses were applied to investigate the gene relationships, functional clustering, mechanisms involved in GBE exposure. These analyses indicate alteration in the expression of genes coding for drug metabolizing enzymes, the NRF2- mediated oxidative stress response pathway, and the Myc gene-centered network named “cell cycle, cellular movement and cancer” were found. These results indicate that Ginkgo biloba related drug metabolizing enzymes may cause herb-drug interactions and contribute to hepatotoxicity. In addition, the outcomes of pathway and network analysis may be used to elucidate the toxic mechanisms of Ginkgo biloba.
Ginkgo biloba extract; microarray; gene expression; drug metabolizing gene; pathway analysis; network analysis