ABSTRACT
Background@#The clinical use of sildenafil citrate (Viagra), a drug used to treat erectile dysfunction, is limited because of its many side effects on tissues. In this context, we aimed to investigate the protective effects of hesperidin, a citrus flavonoid, on hepatic and testicular damage induced by a high dose of sildenafil citrate in male rats. Rats were randomly divided into four groups. The first group was used as the control group. The second group was orally administered sildenafil citrate at a high dose of 75 mg/kg thrice a week. In the third group, hesperidin was administered orally at a dose of 50 mg/kg/day. The fourth group was administered 75 mg/kg sildenafil citrate three times a week with 50 mg/kg hesperidin daily. The experiment lasted for 28 days. @*Results@#In the sildenafil-treated groups, blood indices were altered, liver function tests were deranged, and serum testosterone levels were reduced. In the liver and testicular tissue, sildenafil citrate treatment resulted in significant reductions in catalase and total antioxidant capacity; as well as increased malondialdehyde, reactive oxygen species, and nitrous oxide levels. In addition, sildenafil citrate treatment caused abnormal histopathological patterns in both the liver and the testes. Liver vascular endothelial growth factor and testicular steroidogenic acute regulatory protein gene expression were upregulated. @*Conclusions@#Hesperidin attenuated the harmful effects of intensive sildenafil citrate treatment on liver and testicular functions, alleviated oxidative stress and normalized blood indices. Therefore, hesperidin could be protective against sildenafil citrate-induced oxidative damage that may develop over the long term.
ABSTRACT
To determine the incidence, diversity of [ADRs], and impact of pharmacovigilance on reporting. This prospective and retrospective study was carried out in the Department of Medicine, King Abdulaziz University Hospital, Jeddah, Kingdom of Saudi Arabia between January to December 2011 in 600 patients of ADR. Data regarding age and gender distribution of the patients, incidence rate, drugs, body systems/organs involved in ADR, time of occurrence of adverse drug reactions, total number of drugs administered, and impact of pharmacovigilance on finding the incidence rate of ADR were recorded. Comparison of the 2 data was carried out to determine the impact of pharmacovigilance. Incidence rate of ADRs in retrospective study was 3.1% and 5.5% in the prospective study. The highest incidence of ADR [retrospective 15% and prospective 14.5%] was observed in both groups in patients receiving more than 10 drugs. The frequency of ADR in relation to age in both groups was highest in patients of age >60 years; it was 52.7% in retrospective study and 54.5% in prospective study. Antibiotics were the more frequently involved in ADR, [48.5% in prospective study and 36.9% in retrospective study]. The system most commonly involved in ADR was gastrointestinal tract 47.4% in retrospective study and 57.6% in prospective study. None of the ADR proved to be fatal. Low incidence of hospitalized ADR in our study [5.5%] is due to lack of awareness in healthcare professionals in reporting ADR. Undoubtedly, pharmacovigilance brought more patients with ADR to record