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In studies with healthy volunteers of single doses up to 800 mg, adverse reactions were similar to those seen at lower doses but incidence rates and severities were increased. Analysis of the safety database from controlled clinical trials showed no apparent difference in adverse reactions in patients taking VIAGRA with and without anti-hypertensive medication. This analysis was performed retrospectively, and was not powered to detect any pre-specified difference in adverse reactions. Counseling of patients about the protective measures necessary to guard against sexually transmitted diseases, including the Human Immunodeficiency Virus (HIV), may be considered. However, there are no controlled clinical data on the safety or efficacy of VIAGRA in patients with sickle cell or related anemias. For example, a study conducted at McMaster University examined the effect of sildenafil on erectile function in men with diabetes mellitus.
1mg is the same as 0.001g, so the amount of active ingredient in a Viagra tablet is quite small, but that’s all that’s needed for it to work safely for most men. Ashcroft Pharmacy is a UK-registered online pharmacy committed to providing accurate and up-to-date information about medications and healthcare services. However, the information presented here is not exhaustive and does not cover all possible uses, actions, precautions, side effects, or interactions of the medications mentioned. Elderly patients (65 years and above) who have age-related liver, kidney, or heart problems should start Viagra in the lowest possible doses to reduce the incidences of adverse reactions. MrMed’s primary intention is to ensure that its consumers get information that is reviewed by experts, accurate and trustworthy. The information and contents of this website are for informational purposes only.
But a rare side effect of Viagra tablet is swelling of your genitals, including your penis. The dose may be increased to a maximum of 100 mg or decreased to 25 mg depending on the effectiveness and side effects. Patients with liver problems or severe kidney problems should start treatment with the 25 mg dose. The recommended dose of Viagra is 50 mg taken as needed about one hour before sexual activity. If Viagra is taken with food, the onset of activity may be delayed compared with taking it without food.
Counselling can be effective for some men who have erectile dysfunction (ED), particularly younger men who have no underlying physical cause of their ED. A trial of erectile dysfunction medication should be repeated at least 4 times before deciding whether Viagra is working and before requesting a change of dosage or change to another ED medication. As with any treatment, there are times when ED tablets might not work and may not improve or overcome the underlying cause of erectile dysfunction.
Viagra belongs to a class of medications called phosphodiesterase-5 (PDE-5) inhibitors. It works by temporarily increasing the blood flow to your penis, helping you to get and maintain an erection. Regarding which medication allows an erection to last longer, the clear winner is tadalafil. Sildenafil remains effective for four to six hours, while tadalafil will enable patients to achieve erections up to 36 hours after ingestion, an effect usually seen in younger patients or lesser degrees of ED. In both cases, the drug does not increase desire, instead allowing for a better erection when the desire is present. The contents of this website are for informational purposes only and not intended to be a substitute for professional medical advice, diagnosis, or treatment.
Make sure that you inform them if you notice any side effects or if your treatment isn’t working like it should. There are four different Sildenafil dosages prescribed for the treatment of erectile dysfunction. The different Viagra strengths give the option to raise or lower the amount of active ingredient (sildenafil citrate), depending on how your body reacts to the treatment. Viagra has been studied in four main studies including 1,690 men aged 19 to 87 years, where it was compared with placebo (a dummy treatment) for between 12 and 26 weeks. Two of these studies used fixed doses (patients allocated to 25, 50 or 100 mg) and two studies were flexible (patients started on 25 mg and could be moved to 50 or 100 mg depending on their response). In addition, there were studies in patients with spinal cord injury and with diabetes.
Certain drugs used to treat benign prostatic hyperplasia (BPH) can also cause low blood pressure. Viagra contains the drug sildenafil, while Levitra contains the drug vardenafil. Both Viagra and Levitra belong to a group of drugs called phosphodiesterase type 5 (PDE5) inhibitors.
This section covers common questions about the dosage of Viagra. Across all trials, VIAGRA improved the erections of 43% of radical prostatectomy patients compared to 15% on placebo. One-third to one-half of the subjects in these studies reported successful intercourse at least once during a 4-week, treatment-free run-in period. There was no impairment of fertility in rats given sildenafil up to 60 mg/kg/day for 36 days to females and 102 days to males, a dose producing an AUC value of more than 25 times the human male AUC. In a study of healthy male volunteers, sildenafil (100 mg) did not affect the steady state pharmacokinetics of the HIV protease inhibitors, saquinavir and ritonavir, both of which are CYP3A4 substrates. In healthy male volunteers, there was no evidence of a clinically significant effect of azithromycin (500 mg daily for 3 days) on the systemic exposure of sildenafil or its major circulating metabolite.
Avoid consumption of alcohol as it may impair your ability to get an erection. Taking SILDENAFIL after a heavy meal might take longer time for the medicine to work