Medicine Name: Theo-Asthalin Tablet. Composition: Salbutamol (2mg) + Theophylline (100mg). Side Effects: Nausea Tremors Headache Palpitations Muscle cramp Throat irritation Respiratory tract infection Respiratory tract inflammation Cough Arrhythmia irregular heartbeats Tachycardia Dizziness Decreased potassium level in blood Nervousness Weakness Irritability Drowsiness Flushing sense of warmth in the face ears neck and trunk Difficulty in urination.