Medicine Name: Stelbid Spas 80mg/50mg Tablet. Composition: Drotaverine (80mg) + Diclofenac (50mg). Side Effects: Diarrhea Nausea Vomiting Dryness in mouth Dizziness Vertigo Insomnia difficulty in sleeping Hypotension low blood pressure Tachycardia Sweating Constipation Dyspepsia Abdominal pain Increased liver enzymes.