Why do they say"don`t drink alcohol in excess" with cialis?

Question

Why do they say"don`t drink alcohol in excess" with cialis?

Answer 1

Yes, as Jack says above, you can pass out or worse.  It can be life threatening.

Answer 2

Cialis lowers your blood pressure and alcohol is a depressant to your heart if consumed in excess so the two can be dangerous to the heart.

Answer 3

certain medicines shouldn't be taken with alcohol, one reason could be that the medicine is processed by the liver and they are trying to minimize the extent of damage you could have done, some medicines and alcohol can make a dangerous combination, and the effect of some medicines may be minimized or maximized by alcohol or other drug combinations.