Does Sildenafil Interact with Doxazosin?
CDI records a moderate classification for Sildenafil and Doxazosin. The stored summary is: Alpha-blocker causing additive blood pressure lowering effects with sildenafil, with reports of symptomatic postural hypotension including dizziness and light-headedness. The mechanism involves additive blood pressure reduction. Patients taking both medications should consult their healthcare provider before starting, stopping, or changing the dosage of either drug. This record was extracted from drug labeling through openFDA. NIH/NLM RxNorm is used for drug identities. The summary and severity classification are CDI's processed information, not a verbatim source quotation. Product, route, and patient circumstances matter.
- Severity
- Moderate
- Sildenafil Class
- Phosphodiesterase 5 Inhibitor
- Management
- Monitor for effects
- Data Source
- U.S. FDA via OpenFDA
Recorded Mechanism
Additive blood pressure reduction
What To Tell Your Doctor or Pharmacist
If you are taking Sildenafil and your doctor is considering prescribing Doxazosin (or vice versa), make sure to:
- Inform your doctor and pharmacist of all current medications, including over-the-counter drugs and supplements
- Ask whether the benefits of combining these medications outweigh the risks for your specific situation
- Ask what symptoms to watch for that would indicate the interaction is causing problems
- Ask whether any dosage adjustments are needed
- Never stop or change either medication without first consulting your healthcare provider