# Viagra

> trade name of a pharmaceutical product from Pfizer with the active ingredient sildenafil

**Wikidata**: [Q29006643](https://www.wikidata.org/wiki/Q29006643)  
**Source**: https://4ort.xyz/entity/viagra


## References

1. [Source](http://www.ema.europa.eu/ema/index.jsp?curl=pages/medicines/human/medicines/000202/human_med_001136.jsp)
2. RxNorm
3. [European Medicines Agency](http://www.ema.europa.eu/ema/index.jsp?curl=pages/medicines/human/medicines/000202/human_med_001136.jsp)