Drug Interactions: Insights and Observations

Predicting Drug Interactions with Phosphodiesterase Type 5 Inhibitors

Cindy Ta, PharmD, John R. Horn, PharmD, FCCP and Philip D. Hansten, PharmD

References

1. Sildenafil (Viagra) prescribing information. 2005, Pfizer Inc.

2. Tadalafil (Cialis) prescribing information. 2005, Eli Lilly and Co.

3. Vardenafil (Levitra) prescribing information. 2005, Bayer Pharmaceuticals Corp.

4. Warrington JS et al. In vitro biotransformation of sildenafil (Viagra): identification of human cytochromes and potential drug interactions. Drug Metab Dispos.2000;28:392-7.