Viagra (Sildenafil 50mg) (the active ingredient of the drug «Viagra») in a dosage of 50 mg passed a number of clinical trials in the United States until 2013. The results of these studies have confirmed its effectiveness and safety when used in the treatment of erectile dysfunction.
The dosage of Sildenafil may vary depending on the individual characteristics of the patient and the recommendations of the doctor. Before starting to take this substance, it is necessary to consult with a medical specialist.
Prior to 2013, many studies of sildenafil were conducted in the United States. Some of them are:
- Investigation of the efficacy and safety of sildenafil in erectile dysfunction. The study showed that sildenafil is an effective and safe remedy for the treatment of erectile dysfunction of various etiologies. The results were published in The Journal of Sexual Medicine in 2009. Source: https://pubmed.ncbi.nlm.nih.gov/19453998 /.
- Study of the effect of sildenafil on erectile function in men with type 2 diabetes mellitus. The results showed that sildenafil is safe and effective for the treatment of erectile dysfunction in men with diabetes mellitus. The results were published in the Journal of Sexual Medicine in 2010. Source: https://pubmed.ncbi.nlm.nih.gov/20211042 /.
- The study of sildenafil in patients with erectile dysfunction and concomitant diseases. The results showed that sildenafil is effective and safe for the treatment of erectile dysfunction in patients with concomitant diseases such as coronary heart disease, hypertension, hyperlipidemia, type 2 diabetes mellitus and chronic renal failure. The results were published in The Journal of Sexual Medicine in 2012. Source: https://pubmed.ncbi.nlm.nih.gov/22738090 /.