Does Viagra show up on a drug test? Not on a roadside drug test, and it is not on the anti-doping list used in sport. Roadside drug tests in NSW look for four illegal drugs, and sildenafil — the medicine in Viagra — is not one of them; a search of the World Anti-Doping Agency's Prohibited List finds no entry for it. A laboratory can measure sildenafil if it is asked to, but whatever the sample — urine, saliva, blood or hair — a drug test reports only the substances it is set up to look for.
Does Viagra show up on a roadside drug test?
No. In NSW, police Mobile Drug Testing checks drivers for "four common illegal drugs": ecstasy, cannabis, cocaine and methamphetamine, including speed and ice (NSW Government — alcohol limits, drugs and medicines). Sildenafil is none of these. It is a prescription medicine for erectile dysfunction, and Viagra is on the Australian Register of Therapeutic Goods (ARTG; healthdirect). What the road rules do care about is whether a medicine affects your driving — see below.
Will Viagra show up on a workplace drug test?
It depends on what the test is set up to find, and we could not check that list for you. Urine drug testing has its own Australian and New Zealand standard, AS/NZS 4308:2023, which sets out how urine is collected, screened on site and, if needed, sent to a laboratory (Standards Australia — AS/NZS 4308:2023). The drugs it covers are listed in the standard itself, which is sold rather than published, so we do not guess at them here. If you are asked which medicines you take before a test, name sildenafil: it is a prescription medicine, and your doctor's prescription shows why you take it.
Is Viagra banned in sport?
Not on the current list. A search of the World Anti-Doping Agency's Prohibited List for sildenafil — or for tadalafil, the medicine in Cialis — returns no results (WADA — the Prohibited List, searched 26 September 2026). WADA asks athletes to confirm any substance they cannot find with their anti-doping organisation, and the list is updated at least once a year, with each new version in force from 1 January. In Australia a medicine can be checked by name on Global DRO, which lists Sport Integrity Australia for substance enquiries (Global DRO Australia). Whether sildenafil helps performance is another question: does Viagra enhance athletic performance?
How long does Viagra stay in your body?
Not long. Sildenafil reaches its highest level in the blood 30 to 120 minutes after a tablet taken on an empty stomach, and its half-life — the time it takes for that level to halve — is 3 to 5 hours. It is cleared as breakdown products, mostly in the faeces (about 80% of a dose) and less in the urine (about 13%) (EMA — Viagra product information). Its effect lasts up to 4 hours (healthdirect — Sildenafil). Tadalafil stays far longer: its half-life is 17.5 hours (EMA — Cialis product information) and it works for up to 36 hours (Cialis CMI). Neither label says how long a laboratory could still find the medicine, so we do not give a figure. More on the effect: how long does sildenafil last? Because tadalafil lingers, the two should not be combined: can you mix Viagra and Cialis?
Can Viagra affect your driving?
It can, in some men. The Australian Viagra leaflet says that if you notice changes in vision or dizziness when taking it, "you should not drive or operate machinery" (Viagra CMI), and the Cialis leaflet asks you to be careful driving until you know how it affects you. The NSW Government's advice for any medicine is to read the label and follow a warning not to drive. Alcohol on top of it is its own question: can you drink alcohol with Viagra?
Does it matter where the tablets came from?
Yes — for what is in them. healthdirect warns that when people buy sildenafil online without a prescription, "you can't be sure whether these pills contain the medicine or are counterfeit" (healthdirect), and the TGA says products not on the ARTG "have not been reviewed for safety or quality" (TGA). A tablet that is not what its pack says is also a tablet whose test result nobody can predict.
The short answer
Sildenafil is not among the four drugs NSW roadside tests look for, and WADA's Prohibited List has no entry for it or for tadalafil. A laboratory can measure it if asked, and its level in the blood halves every 3 to 5 hours. If you are asked about medicines before a test, say you take it. Every question about ED medicines and other drugs is answered in our guide to taking Viagra or Cialis with other medicines.
