Primary pulmonary HTN &/or regurgitant cardiac valvular disease, palpitation, tachycardia, BP elevation, ischemic events; overstimulation, restlessness, dizziness, insomnia, euphoria, dysphoria, tremor, headache, psychosis; mouth dryness, unpleasant taste, diarrhea, constipation, other GI disturbances; urticaria; impotence, changes in libido.