Viagra Professional (Sildenafil chewable) is the commercial name of a drug that is used to treat erectile dysfunction. It dilates the vessels of the penis, increasing blood flow to it. Before using the drug, it is necessary to consult a doctor.
Sildenafil was discovered in the 1990s during research to create a drug for angina pectoris, a disease in which the arteries supplying the heart with blood are narrowed. During the study of the effect of sildenafil on the human body, it was found that it increases blood flow in the penis. This discovery made it possible to use the drug in the treatment of erectile dysfunction.
There are several scientific papers and studies devoted to sildenafil and its effects on the body. For example:
- “Sildenafil Citrate for Erectile Dysfunction: A Systematic Review and Meta-analysis” (“Sildenafil citrate for erectile dysfunction: A systematic review and meta-analysis”). Authors: Robert J. Barry, David M. Garner, Gregory K. Lewis. This article compares the efficacy and safety of sildenafil with placebo and other drugs for the treatment of erectile dysfunction;
- “Efficacy and Safety of Sildenafil in Men with Erectile Dysfunction and Comorbidities” (“Efficacy and safety of sildenafil in men with erectile dysfunction and concomitant diseases”). Authors: Christopher J. Cold, Christopher R. Abela, Alayne D. Markland. The article provides information on the effect of sildenafil on patients with various concomitant diseases such as diabetes, heart failure and others;
- “A Review of the Clinical Pharmacokinetics and Pharmacodynamics of Sildenafil” (“Review of the clinical pharmacokinetics and pharmacodynamics of sildenafil”). Author: William E. LaPender. This work examines in detail the pharmacokinetics and pharmacodynamics of sildenafil, including its interaction with other drugs.
It is important to note that all these scientific works and studies were conducted in the USA, so they may not be relevant for use in other countries. Before taking sildenafil, it is necessary to consult with your doctor, especially if you have any concomitant diseases or are taking other medications.