Explainer

Alcohol and ED Medication: What the Labels Actually Say

It is one of the most common questions about ED medication. The answer depends on how much.

Men's Health Weekly staff · October 9, 2026

The quick answer

The tadalafil label warns that heavy drinking with a PDE5 inhibitor can cause dizziness, low blood pressure or fainting.¹
Both alcohol and PDE5 inhibitors can lower blood pressure.^2,1
Heavy drinking is itself a cause of ED.³
A clinician can advise what is safe with your specific health and medications.

A glass of wine with dinner and a planned evening often go together, so it is no surprise that alcohol is one of the most-asked questions about ED medication. Here is what the prescribing information says.

What the labels say

PDE5 inhibitors widen blood vessels and can lower blood pressure slightly.² Alcohol does the same. The tadalafil label warns that drinking substantial amounts of alcohol, which it describes as five units or more, while taking tadalafil can increase the chance of dizziness, a fast heartbeat, low blood pressure or fainting.¹

Moderate vs heavy

The label's concern is heavy drinking, not a single drink. Even so, how alcohol affects you depends on your blood pressure, other medications and body size, so ask the prescribing clinician rather than assuming.

Alcohol works against the goal

There is also a more basic problem. Heavy drinking is one of the recognized causes of ED.³ A medication cannot fully offset the effect of a lot of alcohol on arousal and erections.

Combination medications

Some compounded ED products combine PDE5 inhibitors with apomorphine, whose most common side effect is nausea,⁴ which alcohol can make worse. Ask the clinician specifically about alcohol if you are prescribed a combination.

The bottom line

Moderate drinking is a question to put to your clinician; heavy drinking alongside ED medication is what the label warns against.

Talk to a clinician. This article explains the evidence; it cannot tell you what is right for you. A licensed clinician who knows your health history and medications can.

Important safety information. PDE5 inhibitors (sildenafil, tadalafil, vardenafil) must not be taken with nitrates in any form, including nitroglycerin, or with guanylate cyclase stimulators such as riociguat, and need caution with alpha-blockers.² The most common side effects are headache and flushing.² An erection lasting more than four hours needs emergency care, and sudden loss of vision or hearing means stopping and getting medical help right away.¹ Only a licensed clinician who knows your health history and medications should decide whether these are safe for you.

Your questions

Can I drink alcohol with sildenafil or tadalafil?

The tadalafil label warns that heavy drinking, five units or more, with a PDE5 inhibitor can cause dizziness, low blood pressure or fainting. Ask your clinician about moderate drinking.

Does alcohol cause ED?

Heavy drinking is a recognized cause of erectile dysfunction.

Sources

Eli Lilly. CIALIS (tadalafil) prescribing information. DailyMed, U.S. National Library of Medicine.
Pfizer. VIAGRA (sildenafil citrate) prescribing information. DailyMed, U.S. National Library of Medicine.
National Institute of Diabetes and Digestive and Kidney Diseases. Erectile Dysfunction (ED). National Institutes of Health.
Dula E, et al. Double-blind, crossover comparison of 3 mg apomorphine SL with placebo and with 4 mg apomorphine SL in male erectile dysfunction. Eur Urol. 2001. PubMed 11464037.