What should I avoid while taking cialis?
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Do not take any other drug used to treat impotence, such as sildenafil (Viagra), vardenafil (Levitra), alprostadil (Caverject, Muse, Edex) or yohimbine (Yocon, Yodoxin, others), without first talking to your doctor.
Cialis should not be taken with excessive amounts of alcohol (e.g. 5 or more drinks). Excessive alcohol may increase the risk of headache, dizziness, increased heart rate, or low blood pressure when tadalafil is taken.
Grapefruit and grapefruit juice may interact with cialis. The interaction could lead to potentially adverse effects. You should discuss the use of grapefruit and grapefruit juice with your doctor. Do not increase or decrease the amount of grapefruit products in your diet without first talking to your doctor.