If you take a prescription ED medication — sildenafil (Viagra), tadalafil (Cialis), vardenafil (Levitra), or a similar PDE5 inhibitor — and you also use nitrates (including recreational “poppers,” such as amyl, butyl, or isopropyl nitrite) or the medication riociguat, this is not a minor interaction to weigh casually. It’s a recognized contraindication that can cause a sudden, severe, and potentially life-threatening drop in blood pressure. This page explains why, and what your prescriber or pharmacist needs to know to keep you safe.
Why This Combination Is Dangerous
PDE5 inhibitors work by relaxing blood vessels to increase blood flow. Nitrates, nitrite compounds, and riociguat lower blood pressure through an overlapping pathway. Used together, the combined effect can drop blood pressure rapidly and dangerously low, leading to dizziness, fainting, heart attack, or stroke. FDA-approved prescribing information for sildenafil specifically warns against combining it with organic nitrates, organic nitrites in any form, or riociguat because of this risk.
This Includes Recreational Use, Not Just Prescription Nitrates
A common misunderstanding is that this warning only applies to prescription nitrate medications like nitroglycerin, used for chest pain. It doesn’t stop there. Poppers are nitrite compounds and carry the same warning. The FDA has separately advised consumers against using nitrite poppers at all, citing reports of severe blood pressure drops, breathing difficulty, and death, and has noted their particular danger when combined with ED medications. If you use poppers — even occasionally, even socially — and you take or are considering a PDE5 inhibitor, that’s information your prescriber needs, not something to leave out of the conversation.
Why Full Disclosure Matters
A prescriber can only screen for this interaction if they know about every exposure — prescription, over-the-counter, and recreational. Leaving out poppers, supplements, or other medications because they feel unrelated or awkward to mention removes the one safeguard that prevents this interaction. A clinician or pharmacist is positioned to evaluate your full picture, not just the ED prescription in isolation.
A Medication-Safety Worksheet to Bring to Your Appointment
Use this as a starting point for what your prescriber or pharmacist will want to know:
- Exact medication names and doses — the specific ED medication, strength, and how often you take it
- Nitrate, riociguat, or blood-pressure medication check — any nitroglycerin, isosorbide, riociguat, or other blood-pressure-lowering drug you currently take or have been prescribed
- Recreational or occasional use — including poppers or any nitrite-containing product, even if use is infrequent
- Symptom and timing notes — any dizziness, lightheadedness, fainting, or chest discomfort, and when it occurred relative to taking either substance
- A specific question for your prescriber or pharmacist — directly asking whether any medication or substance you use is unsafe to combine with your ED prescription
- Emergency-warning symptoms to know — sudden severe dizziness, fainting, chest pain, or an irregular heartbeat after use warrants immediate emergency medical attention
What This Page Isn’t
This is an educational overview, not a clinical evaluation. It does not provide a timing or “washout” interval between substances, and it does not describe a self-managed way to use both. Those decisions depend on your individual health history and need to be made directly with a qualified prescriber or pharmacist — not worked out on your own.
Your Next Step
Before combining or continuing to use any of these substances together, bring the worksheet above to a conversation with a doctor or pharmacist. For general background on erectile dysfunction, the National Institute of Diabetes and Digestive and Kidney Diseases maintains a plain-language overview (see sources below).
For related coverage on this site, see our piece on the Brazilian Hardening Secret and the “erection muscle” trick, which looks at a different angle of ED-adjacent claims circulating online.