This leads to shortness of breath when exercising or completing regular daily activities. This ensures the medication is always in the person’s system and allows for spontaneous sexual activity without planning dosing times. Follow your doctor’s directions carefully, and ask your doctor or pharmacist to explain any part you do not understand. Do not take a double dose or more than one dose per day to make up for a missed one. If you drink a large amount of alcohol more than five glasses of wine or five shots of whiskey while you are taking tadalafil you are more likely to experience certain side effects of tadalafil such as dizziness, headache, fast heartbeat, and low blood pressure.Cialis (tadalafil) is an orally administered prescription medication used for erectile dysfunction (ED) and pulmonary arterial hypertension (PAH) to reduce the symptoms of an enlarged prostate. mg, 5 mg, 10 mg, or 20 mg • Oral tablet: mg, 5 mg, 10 mg, or 20mg Cialis tablets should be stored in a dry place at room . mg, 5 mg, 10 mg, 20 mg: 5 mg, 10 mg, 20 mg: 50 mg, mg, mg Do not combine them with different ED drugs. Cialis may also be less effective if used alongside antiseizure medications. Hims offers brand name Cialis as a monthly supply of 5-mg tablets that can be taken daily. Generic Cialis (tadalafil) is available in mg, 5-mg, mg, mg, and mg tablets for daily or as.