Tadalafil tablets can be taken 20mg at a time if necessary, and the exact dosage needs to be consulted with a medical professional. Tadalafil tablets are primarily used to treat erectile dysfunction. The recommended dose of Tadalafil Tablets for most patients is 10mg, taken before sexual intercourse. Depending on individual efficacy and tolerability, the dose may be increased to 20mg or reduced. The maximum recommended frequency for most patients is once daily. Therefore, if necessary, the drug can be taken 20 mg at a time, but in case of any discomfort it is recommended to consult a doctor. The main adverse effects of tadalafil tablets are headache and indigestion. Tadalafil tablets are contraindicated in patients who are allergic to the components of the drug, in patients who are taking any form of nitrates, as well as in patients who have had a heart attack within 90 days, an attack of unstable angina pectoris, have a heart failure of grade 2 or higher, have refractory cardiac arrhythmias, low blood pressure, refractory hypertension, and have suffered a stroke within 6 months. The specific dosage of the drug is recommended to consult a professional physician or pharmacist, do not increase the dosage without authorization to avoid adverse consequences.