Of these, 96 completed the study: 47 (49.0%) in the placebo group and 49 (51.0%) in the doxazosin group ... and gastrointestinal adverse effects (five males and five females).

Beta blockers like atenolol, metaprolol, nebivolol, propranolol, other alpha blockers like doxazosin ... the blood pressure and increase the side effects of the drug causing light headedness ...