Medicine Name: Superfen Gel. Composition: Diclofenac (2.32% w/w) + Capsaicin Based Rubefacients (0.01% w/w) + Methyl Salicylate (10% w/w) + Menthol (5% w/w) + Linseed Oil (3% w/w). Side Effects: Application site reactions burning irritation itching and redness.