Headache, dizziness, constipation, diarrhea, fever, asthenia, fatigue, arrhythmia, AV block, palpitation, GI disturbances, hematological reactions, hypersensitivity, muscle cramps, arthralgia, CNS effects, bronchospasm, alopecia, acne, pruritic, dry skin, flushing, tinnitus, impotence.