how long does tadalafil last

Tadalafil is a medication used to improve erectile dysfunction (ED) in men and to treat pulmonary arterial hypertension (PAH). When used to help men achieve normal erections, tadalafil requires sexual stimulation to work. It mainly works by relaxing blood vessels and improving blood flow, which helps support an erection.

One of the key advantages of tadalafil is its long duration of action, with effects lasting up to 36 hours. For patients with pulmonary arterial hypertension, tadalafil helps reduce pressure in the pulmonary arteries, improving symptoms such as shortness of breath and fatigue.

According to data from the UK NHS and the US NIH, the effects of tadalafil typically last around 24–36 hours.

How Long Does Tadalafil Work?

Effective window:

The “36-hour effect” does not mean a continuous erection for 36 hours. Instead, it means that within this period after taking tadalafil, a man may be able to achieve an erection when sexual stimulation occurs.

Onset time:

Tadalafil usually begins working within 30–60 minutes after taking it, with blood levels reaching their peak concentration at around 2 hours.

Individual differences:

The duration of tadalafil’s effects can vary depending on factors such as metabolism, liver function, and kidney function. The medication has a half-life of approximately 17.5 hours, which contributes to its long-lasting effect.

Factors That May Affect How Long Tadalafil Lasts

Body metabolism:

People with healthy liver and kidney function may process the medication more efficiently, which can result in a slightly shorter duration of action. Those with slower metabolism may experience longer-lasting effects.

Age and diet:

Older adults may metabolize tadalafil more slowly due to changes in body function, potentially extending the duration of effects. In addition, eating a high-fat meal may delay the time it takes for the medication to start working.