How long BlueChew stays in your system depends on which active ingredient your prescription contains. BlueChew offers three different medications: sildenafil, tadalafil, and vardenafil. Sildenafil and vardenafil clear from your body within about 24 hours, while tadalafil can remain detectable for more than two days after a single dose.
Clearance Times by Ingredient
Each BlueChew formulation uses a different drug, and each drug has its own half-life, the time it takes for your body to eliminate half the dose from your bloodstream. After roughly five half-lives, a drug is considered fully cleared.
- Sildenafil (the same active ingredient as Viagra): Has a half-life of about 4 hours. This means it’s effectively out of your system within 20 to 24 hours. BlueChew offers sildenafil in 30 mg and 45 mg chewable tablets.
- Tadalafil (the same active ingredient as Cialis): Has a much longer half-life of 17.5 hours. According to FDA labeling, some of the active ingredient remains in your body for more than two days after a single tablet. Full clearance takes roughly 3.5 to 4 days.
- Vardenafil (the same active ingredient as Levitra): Has a half-life of 4 to 5 hours, similar to sildenafil. It clears your system within about 20 to 25 hours. BlueChew offers vardenafil in 6 mg and 9 mg doses.
How Long the Effects Actually Last
The drug stays in your bloodstream longer than it produces noticeable effects. The window where you’ll feel the medication working is shorter than the total clearance time.
Sildenafil’s effects typically last 4 to 5 hours, though some people notice effects for up to 12 hours. Vardenafil works for a similar 4 to 5 hour window. Tadalafil stands apart here: it can remain effective for 24 to 36 hours after you take it, which is why it’s sometimes called the “weekend pill.”
Peak blood concentration also varies. Sildenafil and vardenafil typically peak within about an hour. Tadalafil reaches its peak anywhere from 30 minutes to 6 hours after you take it, with 2 hours being the median.
What Slows Down Clearance
All three medications are broken down by the same family of liver enzymes (CYP3A4 and CYP3A5). Anything that interferes with these enzymes can slow metabolism and keep the drug in your system longer. Certain antifungal medications, some antibiotics, and HIV medications like ritonavir are known to have this effect. In one example from FDA data, ritonavir extended vardenafil’s half-life from about 5 hours to 26 hours, a fivefold increase.
Age and liver function also matter. Older adults and people with liver conditions clear these drugs more slowly, which means both the effects and the presence of the drug in the bloodstream last longer.
How Food Affects Timing
Eating a heavy, high-fat meal around the time you take sildenafil delays peak absorption by about an hour and reduces the peak concentration in your blood by roughly 29%. Vardenafil shows a similar pattern when taken with fatty food. This doesn’t necessarily mean the drug works less well overall, but it does shift the timing of when it kicks in and could subtly affect how long you notice the effects.
Tadalafil is less sensitive to food. A high-fat meal can reduce its peak concentration slightly, but it doesn’t change how quickly it reaches that peak. This is one reason tadalafil is considered more flexible in terms of when you take it relative to meals.
Will BlueChew Show on a Drug Test
Standard drug screening panels (the kind used for employment or sports) do not test for sildenafil, tadalafil, or vardenafil. These medications are not controlled substances, and no routine workplace or clinical drug test is designed to detect them. Specialized laboratory testing could identify these compounds if someone specifically looked for them, but this is not part of any standard screening.