We read eight ED product pages. Five never mention the interaction that can kill you.

What we did

Eight products, all of them combinations of two or more prescription erectile dysfunction drugs, all sold online after a questionnaire. For each one we read the public product page — the page an advert sends you to — and recorded whether seven specific pieces of information were present.

We did not test the products, and we did not complete the intake questionnaires: doing that means submitting real medical details and paying. So this is an audit of what a man is told before he decides, which is a narrower question than whether each company practises good medicine. It is also the question that determines whether he knows enough to decide safely.

One caveat we discovered the hard way: a company may run several landing pages for the same product, and they do not always disclose the same things. Where that happened we scored the page its paid advertising points to, and said so. Every individual assessment names the exact page and the date we read it — they are all on our reviews page.

The results

The bottom four rows are ordinary consumer-transparency failures. The top three are the ones that can put someone in hospital.

Why the nitrate row is the one that matters

Nitrates are common heart medicines: nitroglycerin tablets and spray, isosorbide mononitrate and dinitrate, and the recreational amyl nitrite sold as “poppers”. They widen blood vessels. So do all the drugs in these products.

Taken together, blood pressure can fall far enough to starve the heart and brain. People have died from this combination. It is not a caution to weigh against benefits — it is an absolute contraindication, printed on the label of every approved drug in this class.

Now consider who buys these products. Men in their fifties and sixties. The same men most likely to be carrying a nitroglycerin spray for angina. The overlap between the target market and the contraindicated group is enormous, and five of eight pages say nothing.

One page told us its product can cause low blood pressure, and never once connected that to the drug interaction which makes low blood pressure dangerous.

The two that got it right

Two pages in eight do this properly. Both name the drug class, both name the related pulmonary hypertension medicines, and both — the part that actually changes behaviour — explain the consequence:

“Do NOT take any... products if you take medication containing nitrates or guanylate cyclase stimulators for pulmonary hypertension, as this could cause an unsafe drop in blood pressure.”

That is one sentence. It costs nothing. It is the difference between a man recognising his own medication and a man scrolling past a word he does not connect to the spray in his jacket. The second page goes further still, adding alpha-blockers and a warning about sudden vision or hearing loss.

A second page does mention nitrates, but only as “should not be taken with nitrates or certain other medications”, with no explanation and no brand names. We scored that as partial, because a warning that does not tell you what is at stake mostly does not work.

The dose problem

Four of the eight publish no doses at all. They name the ingredients and leave the quantities out.

That is not a transparency quibble, for two reasons. First, a great many men over 50 already have generic sildenafil or tadalafil in a drawer — and without a dose there is no way to know whether taking both would double up. Second, among the four pages that do publish doses, the range is enormous:

That last row exceeds the maximum single dose of both drugs simultaneously. If four products span that range and half of them will not tell you where they sit, “compounded ED treatment” is not a meaningful description of what you are buying.

What “compounded” means, and who says it

There is no FDA-approved medicine that combines two PDE5 inhibitors. Every product in this audit is therefore compounded — mixed to order by a pharmacy rather than manufactured and approved as a product.

Compounding is legal and legitimate. But it carries a consequence, which five of the eight state plainly: the FDA has not assessed the thing you are swallowing for safety, effectiveness or quality. No trial established that the combination beats one drug alone. No regulator confirmed the tablet contains what the label says.

Two pages never mention it. One of those leans on the phrase “Rx only” instead — true, and to most readers it sounds like reassurance, because prescription medicines are normally the approved ones.

One company, two pages, two different stories

The most instructive thing we found was not a failure but an inconsistency. One company runs two landing pages for the same product. One of them carries a full Important Safety Information block — nitrates with the mechanism explained, alpha-blockers, the four-hour rule, sudden vision and hearing loss. The other carries none of it, and uses the dietary-supplement disclaimer instead of the compounded-drug one.

Which one you see depends on which advert you click.

We scored the page the paid advertising points to, and we corrected our review when we found it — the audit went from 1.6 to 3.2. But it tells you something about how this copy gets written. The good version exists. It is a template someone already wrote. When it is missing from a page, that is a choice about conversion, not a gap in anyone's knowledge.

It also means that if you are comparing these products, the page you land on is not necessarily the fullest account the company has published. It is worth looking for the safety block before assuming there is not one.

Is stacking these drugs even a good idea?

Briefly: there is no good evidence that it is. Sildenafil, tadalafil and vardenafil are the same class doing the same thing. Guidelines recommend one, at the lowest effective dose, titrated upward. Adding a second is not a second mechanism — it is a second helping of the first.

One product in this audit contains three of them. If two were better than one, thirty years of pharmaceutical development would have produced an approved combination. The full argument, and the peptides some of them add.

What to do with this

If you are buying one of these, the page will probably not tell you what follows. So:

1. If you take nitrates in any form, do not take any of these products. Not a lower dose, not occasionally. Tell your own doctor what you are considering.
2. Learn the washout period. After sildenafil, wait at least 24 hours before a nitrate; after tadalafil, at least 48. Combination products contain tadalafil, so the 48-hour rule governs — even though the effect wears off in a few hours and you will feel completely normal long before you are safe.
3. An erection lasting more than four hours is an emergency room visit. Not something to wait out overnight. After roughly four to six hours the tissue starts to be damaged permanently.
4. Ask for the dose in writing before you pay. If a service will not tell you, that is your answer.
5. Put it in your medical record. A compounded product bought online will not appear there unless you tell someone. The clinician treating your chest pain in three years needs to know.

A fair word for these companies

Several of them do real things well. Most require a licensed clinician to review the case, and one requires a live consultation in some states. Several publish honest FDA statements. One has cancellation terms and a refund window better than anything else in the category. One is priced at roughly what a pharmacy charges for the generic.

The failure is specific and it is shared: the marketing page has been written to sell, and the safety information has been left to a link, a leaflet, or the intake form. That is legally orthodox and practically useless, because the decision is made on the page.

It would take one sentence to fix, and we have written down which sentence. Every one of these companies is welcome to use it.