Diarrhea, fever, insomnia, fatigue, dry mouth, headache. Tachycardia, palpitations, psychomotor hyperactivity, seizures; abdominal pain, nausea, vomiting, dyspepsia; hepatitis, elevations of liver enzymes, increased bilirubin; hypersensitivity reactions eg, anaphylaxis, angioedema, pruritus, rash & urticaria.