Who should not take Cialis? Talk to your doctor about eating grapefruit and drinking grapefruit juice while taking this medicine. Take all of the tablets for your daily dose at one time each day; do not divide the tablets to take as separate doses. If you are taking tadalafil to treat erectile dysfunction, you should know that it does not cure erectile dysfunction or increase sexual desire. Do not take a double dose to make up for a missed one.Tadalafil – STADA T20 – 20 Milligramm. Tadalafil, sold under the brand name Cialis among others, is a medication used to treat erectile dysfunction, benign prostatic hyperplasia, and pulmonary arterial hypertension. It is taken by mouth. Onset is typically within half an hour and the duration is up to 36 hours. Common side effects include headache, muscle pain, . Cialis (tadalafil) is an expensive drug used to treat erection problems in men. It may also be used to treat the enlargement of the prostate gland. This drug is slightly more popular . $80 for a single or mg oral tablet; Daily generic Cialis (tadalafil) These higher dose pills are available in 5 mg, 10 mg, and 20 mg and should be taken 30–60 minutes