Natural Health Research

Naturopathic Medicine
Health Quizzes
Sildenafil Citrate, Viagra, Revatio


Viagra was the first pill approved to treat erectile dysfunction in the United States.

Viagra inhibits phosphodiesterase type 5, PDE5, which is responsible for degradation of cGMP in the corpus cavernosum.


inhibits phosphodiesterase type 5, PDE5


Erectile dysfunction

Side Effects

carcinogenic, mutagenic
Serious cardiovascular events have occurred:
MI, TIA, HTN, ventricular arrythmia, sudden cardiac death
Dyspepsia 7%, flushing10%, headache16%, nasal congestion 4%

Drug-Vitamin-Herb Interactions




Fantastic new books!

CAM Therapies has studies on natural therapies for over 100 diseases.

CAM Labs lists lab tests for 100 diseases.

Nutritional Genetics is a fantastic resource.



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