Do not take Nilitis 500 mg Tablet 10's if you are allergic to any of its components, aspirin or NSAIDS, or if you have/had stomach/peptic ulcer, perforation, or bleeding, peptic disease, severe heart failure, liver cirrhosis, kidney failure, or if you are in the last three months of pregnancy or breastfeeding. Inform the doctor if you have/had asthma, stomach problems (Crohn’s disease or ulcerative colitis), liver, kidney or heart problems, high blood pressure, stroke, oedema, autoimmune diseases, diabetes, high cholesterol, infections, are in the first six months of pregnancy, smoker, or if you are above 65 years of age. Nilitis 500 mg Tablet 10's is not recommended for children. Stop taking Nilitis 500 mg Tablet 10's and consult a doctor immediately if you experience difficulty breathing, face or throat swelling, severe rash that may blister, chest pain or sudden numbness and confusion, blood in stools (black/tarry stools), or blood in vomit (dark particles that look like coffee granules). Do not take Nilitis 500 mg Tablet 10's if you have recently had a heart attack unless prescribed by your doctor. Seek emergency medical help immediately if you experience symptoms such as chest pain, weakness in one part or side of the body, shortness of breath, or slurred speech. Nilitis 500 mg Tablet 10's may cause gastrointestinal events, including bleeding, ulceration, and perforation of the stomach or intestines. If you experience any of the following symptoms, stop taking Nilitis 500 mg Tablet 10's and consult your doctor: stomach pain, vomit that is bloody or looks like coffee grounds, heartburn, blood in the stool, or black and tarry stools.