Nervous system disorders: Abnormal sensation, scalp tingling

Cardiac disorders: Hypotension, syncope, low heart rate, heart block.

Respiratory disorders: Bronchospasm

Gastrointestinal disorders: diarrhea, abdominal pain, nausea, vomiting

Hypersensitivity: rash, urticaria, pruritus, angioedema, dyspnea, anaphylactoid reactions

Hepatic disorders: liver necrosis; hepatitis; cholestatic jaundice; elevated liver function tests.

Skin disorders: generalized maculopapular rash; lichenoid reactions; Systemic lupus erythematosus; lichen planus; facial erythema; Peyronie’s disease, hair loss

Urinary System: Difficulty in micturition, urine retention

Musculoskeletal System: Muscle cramps