A forum thread, a friend or an ad mentions Kamagra, Cenforce or Fildena as “the same as Viagra, but cheaper.” Same what, exactly? None of the three appears in the FDA-approved drug databases, and the regulators that have commented describe a market where you cannot know what is in the pill. This page is about protecting yourself, not about where to find them.
These are brand names used by online sellers, not FDA-approved medicines. They are marketed around sildenafil, the active ingredient in Viagra, but a brand name on a package is not evidence of what is inside. Regulators in the US and UK have repeatedly found that unapproved erectile dysfunction products may contain the wrong dose, no active ingredient or hidden drugs.
Check the databases first
On October 30, 2026, we searched DailyMed, the National Library of Medicine’s database of FDA-submitted drug labels, for the names Kamagra, Cenforce and Fildena. Each returned zero labels. A search of openFDA’s Drugs@FDA product records for those brand names also returned no matches, while the same search for Viagra returns results. That does not prove a name is never used on a legitimate foreign product; it means that in the FDA systems that list US-approved and US-labeled drugs, these brands are absent.
The US label for Viagra lists tablets in 25 mg, 50 mg and 100 mg strengths, says the maximum recommended dosing frequency is once per day, and carries “Rx only.” Anything sold under another name, in a form such as an oral jelly or in strengths that do not match the label, is not covered by that document, and the label’s safety information was not generated for it.
What regulators have said
FDA’s Import Alert 66-57 tells field staff that they may detain, without physical examination, foreign-made unapproved prescription drugs sold to individuals in the US. Its stated reason: FDA has observed these drugs offered by unsafe online pharmacies, and unapproved drugs “may be contaminated, contain varying amounts of active ingredients, or contain different ingredients altogether.” The alert’s product list includes an entry described as “Kamagra (Sildenafil 100 mg. oral tablet)” tied to an Indian firm. We did not find Cenforce or Fildena entries in that alert, and an absence from one alert says nothing about whether the product is approved or safe.
In the UK, the MHRA’s February 13, 2026 announcement on seized erectile dysfunction pills reports around 19.5 million doses seized between 2021 and 2025, many sold online and containing sildenafil, tadalafil, vardenafil or avanafil. It warns such products “may contain no active ingredient, the wrong dose, hidden drugs or toxic ingredients,” and that unlicensed versions can be especially dangerous for people with heart disease, high blood pressure or other medicines. A separate MHRA case notice describes unlicensed Kamagra and Super Kamagra among illegally supplied medicines whose active ingredients include sildenafil and tadalafil, noting possible heart-attack risk (MHRA).
| Name | What we could verify | What we could not verify |
|---|---|---|
| Kamagra | Not in DailyMed or Drugs@FDA; an FDA import alert lists a Kamagra sildenafil 100 mg tablet entry; MHRA calls Kamagra and Super Kamagra unlicensed in an enforcement case | The contents of any specific product you may be offered; the “oral jelly” version has no US label |
| Cenforce | Not in DailyMed or Drugs@FDA | Active ingredient and strength from a regulator or lab source; the claims we found came from sellers |
| Fildena | Not in DailyMed or Drugs@FDA | As above |
The missing right-hand column is the point. Seller sites describe all three as sildenafil, and that is plausible, but a plausible description from the party selling the pill is not an assay. You cannot read the dose on the strip and know the dose in the tablet.
Why a “same ingredient” claim is weaker than it sounds
- Dose accuracy. Approved medicines are made under manufacturing rules and tested for strength. The FDA import alert says unapproved versions may carry varying amounts.
- Safety information. The Viagra label contraindicates use with nitrates in any form and warns about priapism, sudden vision loss and sudden hearing loss. A packet with no US labeling gives you none of this.
- Formats nobody tested. The jelly or sachet forms sold under these names are not forms covered by the Viagra label. How fast they act, and how much reaches your bloodstream, has no FDA-reviewed answer.
- Look-alike counterfeits. The MHRA notes that these pills “may look genuine” but be potentially dangerous.
Do not take any sildenafil-type product without your cardiologist or prescriber knowing. The combination with nitrates is contraindicated on the Viagra label because of a potentially serious drop in blood pressure. An unlabeled product removes your chance to check.
If you already have some
- Do not take it if you use nitrate medicines, have heart disease, uncontrolled blood pressure, or are unsure of your medical history.
- Keep the packaging and note where it came from, in case a clinician or poison center needs to know.
- Tell your prescriber or pharmacist what you bought and whether you took any. They can advise about interactions, and this does not need to be an uncomfortable conversation; it is routine.
- Report problems through FDA’s MedWatch, and report suspicious sellers through the links on FDA’s BeSafeRx page.
- Seek emergency care for chest pain, fainting, an erection lasting more than 4 hours, or sudden loss of vision or hearing, all of which appear in the Viagra label as reasons to stop and seek care.
Questions people ask
Is it legal to import these for personal use?
FDA’s Import Alert 66-57 tells staff that commercial and personal shipments of the foreign unapproved prescription drugs on its list may be detained without physical examination, and that verified affirmations of compliance with an approved application are expected. In practice that means a package can be stopped, and nothing about customs clearance makes the contents safe or accurate. This article is not legal advice; the point is that arriving in the mail does not validate a pill.
Are they at least the same as generic sildenafil?
US generic sildenafil is an FDA-approved product that has met standards for manufacturing and for being equivalent to the brand. DailyMed lists over 200 sildenafil labels, all describing prescription medicine. An unapproved product sold under another brand name has not gone through that review, so “same ingredient” is a claim about marketing, not about tested equivalence.
Does the jelly or sachet work faster?
There is no US label that describes the speed, absorption or food effect of a sildenafil jelly. The Viagra label does describe that a high-fat meal slowed absorption of the tablet, with a mean delay of 60 minutes in reaching peak levels and a 29% reduction in peak concentration. That is the kind of information that is simply missing for an unreviewed format.
It worked for a friend. Does that mean it is safe?
One uneventful experience tells you little. The risks the labels describe, such as a dangerous drop in blood pressure with nitrates or priapism, depend on who takes the product and what else they take. MHRA’s warning applies to the product category, not to any single man’s result.
The scale of the problem
The MHRA’s February 2026 figures give a sense of how large the market for unlicensed erectile dysfunction products is, at least in the UK: around 19.5 million doses seized between 2021 and 2025, with yearly seizures more than doubling since 2022, and more than 1,500 websites and social media accounts illegally selling medical products disrupted in 2025. We did not find a comparable US figure in the sources we opened, so we do not extrapolate. The point is not the exact number but that this is a category criminals actively supply, which is why a familiar-sounding name on a listing is no assurance.
What to show the pharmacist
If you already have a strip or jelly sachet, a photo of the front and back of the package, any batch or lot number and the date you started it gives a pharmacist or poison center something concrete to work with. They cannot tell you what is inside from a picture, but they can ask the right questions about your medicines, your heart and your symptoms. Be as specific as you can about what you took and when, because the timing relative to any nitrate or alpha-blocker is the key safety detail.
Why people go this route, and what else exists
The reasons are understandable: embarrassment, cost, wait times, and ads that make a prescription seem unnecessary. They are also fixable. Generic sildenafil, tadalafil and vardenafil are available as FDA-approved prescription products, and the first step is a conversation, in person or by video, that checks your heart and your medicines. If cost is the barrier, ask the prescriber or pharmacist about generics and about the pharmacy’s own pricing; we are not recommending any program.
Understanding how the three approved PDE5 inhibitors differ also helps, since the right choice is not always the one on an ad. See PDE5 inhibitors compared, and for the broader question of “Is Viagra sold over the counter?” see our US over-the-counter explainer. If a product is described as an all-natural alternative, natural Viagra and hidden drug ingredients covers that separate risk. For safer online buying habits in general, see generic medicines and online pharmacy safety.
Sources
- DailyMed: Viagra label
- FDA: Import Alert 66-57
- FDA: BeSafeRx
- MHRA (UK): 20 million illegal erectile dysfunction pills seized, February 13, 2026
- MHRA (UK): Sussex sentencing notice
Evidence checked October 30, 2026. General consumer-protection information; it does not describe where to obtain any product.