There is essentially no practical difference between sildenafil and sildenafil citrate — they are the same active ingredient. "Sildenafil citrate" is simply the full chemical name of the salt form used in the tablet, while "sildenafil" is the everyday short name. Both treat erectile dysfunction the same way, and both are what gives Viagra and its generics their effect.
Sildenafil and sildenafil citrate: the same thing
Sildenafil and sildenafil citrate have identical active ingredients and work in exactly the same way in the body. The "citrate" part refers to the citrate salt, a common way of formulating a drug so it is stable and well absorbed. When you read "sildenafil citrate" on a packet and "sildenafil" elsewhere, you are looking at two names for the same compound. Both share the same mechanism of action — improving blood flow to the penis during arousal — and the same medical uses.
Where the name comes from
The compound was developed and first marketed by Pfizer as Viagra. Once the patent expired, generic versions became available under the drug's own name. Whether a product is labelled "sildenafil" or "sildenafil citrate", it is the same medicine that powers branded Viagra, as our guide to sildenafil versus Viagra explains. The different wording is a matter of chemistry and labelling, not of strength or effect.
Uses and dosages
Sildenafil (citrate) is mainly used to treat erectile dysfunction, but it is also used, under different brand names, to treat pulmonary arterial hypertension, a condition affecting blood pressure in the lungs. For ED it comes in the familiar strengths of 25mg, 50mg and 100mg, adjusted by a doctor to suit the individual. The dose and indication depend on the condition, not on whether the label says "sildenafil" or "sildenafil citrate".
Price and branding
As with Viagra versus generic sildenafil, the meaningful difference between products is price and branding rather than the molecule. A generic sildenafil citrate tablet delivers the same result as a branded one at a lower cost. So if you see both terms while comparing prices, do not be confused into paying more for one over the other — they are equivalent. For the cheapest legitimate options, see the cheapest ED medication, and for availability, generic Viagra in Canada.
Why the wording causes confusion
Most of the confusion around 'sildenafil' versus 'sildenafil citrate' is simply about how products are labelled. Manufacturers and pharmacies may use the full chemical name on packaging for precision, while marketing, prescriptions and everyday conversation use the shorter form. Neither tells you anything about quality or strength — a 50mg tablet labelled 'sildenafil citrate' delivers the same dose as one labelled 'sildenafil'. The same applies to the brand name Viagra, which is yet another label for the identical compound. Once you know these are three names for one medicine, the wording stops being a worry. The only things worth comparing between products are the dose, the price, and whether they come from a properly regulated source — not which version of the name appears on the box.
For more on the medicines used for ED, return to our erectile dysfunction and Viagra hub.