Which blood pressure medicines combine safely with ED pills?
Most of the common ones do, with only a small added drop in pressure. PDE5 inhibitors such as tadalafil (Cialis) and sildenafil (Viagra) are mild blood vessel relaxers themselves, so the labels tested them alongside widely used blood pressure drugs.
| Blood pressure medicine | Combined with | Extra drop in blood pressure vs placebo |
|---|---|---|
| Amlodipine (calcium channel blocker) | Tadalafil 10 mg | 3/2 mm Hg |
| Amlodipine | Sildenafil 100 mg | 8/7 mm Hg |
| Enalapril (ACE inhibitor) | Tadalafil 10 mg | 4/1 mm Hg |
| Metoprolol (beta-blocker) | Tadalafil 10 mg | 5/3 mm Hg |
| Bendrofluazide (thiazide-type diuretic) | Tadalafil 10 mg | 6/4 mm Hg |
| Angiotensin receptor blockers, alone or with others | Tadalafil 20 mg | 8/4 mm Hg |
Tadalafil figures come from the Cialis label and the sildenafil figure from the Viagra label. Both labels still ask clinicians to discuss the added effect with patients, because a few points can matter for a man whose pressure already runs low, who is dehydrated or who takes several blood pressure drugs at once.
Why do alpha-blockers need extra care?
Alpha-blockers lower blood pressure in a way that stacks more noticeably with PDE5 inhibitors, especially when you stand up. They include doxazosin, terazosin and prazosin, used for blood pressure or the prostate, and tamsulosin, alfuzosin and silodosin, used mainly for urinary symptoms. In one label study, tadalafil 20 mg taken with doxazosin 8 mg lowered standing systolic pressure by an average of 9.8 mm Hg more than placebo.
The labels set three rules:
- Be stable on the alpha-blocker first. Men whose pressure is unsteady on the alpha-blocker alone have a higher chance of dizziness or fainting.
- Start the ED pill at the lowest dose. For sildenafil, the label names 25 mg.
- Do not use tadalafil with an alpha-blocker to treat prostate symptoms. The Cialis label says that combination has not been adequately studied for that purpose and carries a risk of low blood pressure.
Your provider may also suggest taking the two medicines at different times of day. That is a clinical judgment for your situation rather than a label rule.
Why are nitrates the hard stop?
Nitrates and PDE5 inhibitors act on the same pathway, and together they can cause a sudden, dangerous fall in blood pressure. Both labels list nitrates in any form as a contraindication, meaning the combination should never be used. That includes nitroglycerin tablets, sprays and patches, isosorbide, and recreational “poppers.” The AUA guideline adds that men who carry nitroglycerin for angina should not use it within 24 hours of an ED pill, and longer after tadalafil. Our page on why ED pills and nitrates cannot mix explains the timing.
What symptoms mean the combination is too strong?
Lightheadedness when you stand, a pounding or racing heartbeat, flushing with dizziness, or feeling faint are signs your pressure has dropped too far. Sit or lie down until it passes, and tell your provider before the next dose. Alcohol makes this more likely; see alcohol with ED pills.
Fainting, chest pain or trouble breathing is a 911 call. Tell the responders which ED pill you took and when.
Does high blood pressure cause ED in the first place?
It can. NIDDK lists high blood pressure and other blood vessel diseases among the most common causes of ED, and certain medicines can contribute too. That is one more reason the medicine review matters: sometimes the plan changes the ED treatment, and sometimes it is worth asking the doctor who manages your blood pressure about alternatives. Our page for men on blood pressure medicines covers this in more depth.
How Ultimate Male reviews your blood pressure medicines
At your consultation, your blood pressure is measured and every medicine you take is reviewed by name and dose, including the ones you only take now and then. Your PA-C or MD then chooses the ED medicine, starting dose and timing that fit around your heart and blood pressure treatment.
If you take an alpha-blocker for urinary symptoms, daily tadalafil may change the picture; read whether daily Cialis can help urinary symptoms before your visit. Follow-up checks how you feel on the combination and adjusts from there. See all options on the ED medications page, or book online when you are ready.
