Patients taking tadalafil usually do not affect sleep and cause insomnia. Tadalafil is a mild vasodilator, has a certain vasodilating effect on the blood vessels of the penile cavernous body, and is mainly used for the treatment of erectile dysfunction in clinical practice. Some patients may experience adverse reactions such as headache, dyspepsia, back pain and nasal congestion after taking it, which usually does not affect sleep. Tadalafil should not be used in people such as children and women, and should not be taken by patients who are allergic to tadalafil. Tadalafil tablets are strictly prohibited if you are taking any form of nitrates. Tadalafil should not be taken after consuming large amounts of alcohol as this may affect the efficacy of the drug. Patients with indications for the use of the drug can take tadalafil correctly under the guidance of a doctor, and should not use the drug on their own to avoid adverse reactions.