Tadalafil does not usually stay erect after taking it, but in rare cases, the erection may last for more than 4 hours, and immediate medical attention should be sought.
Tadalafil inhibits phosphodiesterase type 5, which is effective in treating erectile dysfunction. Erections are only possible with sexual stimulation; they do not take effect without sexual stimulation and are not possible for a period of time after ejaculation. Therefore, taking this drug does not usually result in a constant erection.
However, there are rare cases where the erection lasts for more than 4 hours, which should be taken seriously and treated promptly to avoid adverse consequences.
Side effects after the use of tadalafil include nasal congestion, indigestion, headache, back pain, myalgia, flushing, limb pain, etc. Allergy to this drug is prohibited, and tadalafil can not be taken with nitrate drugs.
It is recommended to use the drug under the guidance of a physician according to the situation, and should not be taken blindly.