Mesalazine 400 mg tablets are used to treat ulcerative colitis and Crohnâs disease. They help reduce swelling in the bowel and relieve symptoms like pain, diarrhea, and bleeding. Side effects may include nausea, headache, and stomach upset. Usually taken 2â3 times daily after meals as directed. Active Ingredient (Generic Name): Mesalazine Indication: Ulcerative colitis, Crohnâs disease Manufacturer: Sun Pharmaceutical Industries Ltd Packaging: 10 tablets in 1 strip Strength 400mg Delivery Time: 6 To 15 days