Background The aim of this study was to find the prevalence of potential drug-herb interactions in patients with chronic diseases and identify factors associated with these interactions if present.
Method The study was a questionnaire based cross-sectional study. It was conducted at a number of governmental primary healthcare centers which include outpatient clinics for chronic diseases between July and November 2013. Patients come to these clinics monthly or bimonthly to receive their medications for their chronic diseases free. The patients in this study were seen at these clinics and their medications were reported from the most recent prescription in their files.
Results A total of 400 patients agreed to be interviewed, 209 (52.3 %) were females. The most commonly used medications were metformin, insulin, and enalapril. Among the patients, 237 (59.3 %) were using 395 medicinal herbs. The most commonly used herbs were sage, anise and peppermint. In 51 out of the 237 cases (21.5 %) at least one potential drug-herb interaction was found. Male patients were more likely to have potential drug-herb interactions. Patients with potential drug herb interactions were older, having a higher mean number of chronic diseases and medications (P-value < 0.05). Only 133 out of 237 (56.1 %) users told their prescribers or pharmacists before using medicinal herbs.
Conclusion Use of medicinal herbs is a common practice among Palestinian patients attending primary healthcare centers. A substantial proportion failed to disclose to their doctors or pharmacists about herbal products they used, therefore, the physicians and pharmacists are recommended to ask patients about the use of medicinal herbs to avoid any possible negative outcomes. Better counseling and communication between patients and healthcare providers is recommended.
The aim of this study was to find the prevalence of potential drug-herb interactions in patients with chronic diseases and identify factors associated with these interactions if present.
The study was a questionnaire based cross-sectional study. It was conducted at a number of governmental primary healthcare centers which include outpatient clinics for chronic diseases between July and November 2013. Patients come to these clinics monthly or bimonthly to receive their medications for their chronic diseases free. The patients in this study were seen at these clinics and their medications were reported from the most recent prescription in their files.
A total of 400 patients agreed to be interviewed, 209 (52.3 %) were females. The most commonly used medications were metformin, insulin, and enalapril. Among the patients, 237 (59.3 %) were using 395 medicinal herbs. The most commonly used herbs were sage, anise and peppermint. In 51 out of the 237 cases (21.5 %) at least one potential drug-herb interaction was found. Male patients were more likely to have potential drug-herb interactions. Patients with potential drug herb interactions were older, having a higher mean number of chronic diseases and medications (P-value < 0.05). Only 133 out of 237 (56.1 %) users told their prescribers or pharmacists before using medicinal herbs.
Use of medicinal herbs is a common practice among Palestinian patients attending primary healthcare centers. A substantial proportion failed to disclose to their doctors or pharmacists about herbal products they used, therefore, the physicians and pharmacists are recommended to ask patients about the use of medicinal herbs to avoid any possible negative outcomes. Better counseling and communication between patients and healthcare providers is recommended.
Removal of cadmium from aqueous solutions using 20 species of plant leaves and combinations of these leaves have been studied. Several factors affecting the removal efficiency have been studied. The most efficient types of plant leaves for the removal of cadmium are those of styrax, plum, pomegranate and walnut. The interaction effect of the combined leaf samples on the efficiency of removal of cadmium has been found to be additive in combinations involving styrax plant leaves but seems to be antagonistic in all other combinations. The optimum experimental conditions for removal of cadmium have been found to be at pH 4.1, using high concentrations of naturally dried plant leaves, using ground leaves and to remove cadmium from agitated aqueous solutions. The percentage of metal removed at an initial cadmium concentration of 10 mg/l by the most efficient types of leaves have been found to be 85% for styrax leaves, 85% for plum leaves, 80% for pomegranate leaves, 78% for walnut leaves and 77% for meddler leaves. The presence of foreign ions or complexing agents has been found to reduce the efficiency of removal of cadmium by plant leaves. About 80–85% of the cadmium in charged plant leaves has been released under the influence of changing the pH of the solution, addition of competing ions and the addition of EDTA. The results of removal of cadmium by plant leaves have been found to follow the Freundlich adsorption isotherm, first-order reaction with respect to cadmium and to have intra-pore diffusion as the rate-limiting step.