What the side effect of nsaid ?

Several: They may increase the chance of heart attack or stroke. This increases if you have heart disease or risk factors for it, such as high blood pressure or when nsaids are taken for long periods. Stomach and intestine ulcers and bleeding may occur that can cause death. Allergic reactions may occur as with any other class of drugs.

Many complications: The commonest are GI upset, heartburn and some blood loss from the GI tract. They reduce the efficacy of blood pressure meds. They affect the kidney and may cause protein in the urine even in young people. As already mentioned, they prevent the beneficial effect of Aspirin on heart disease. Asthmatis, who have sinusitis or nasal polyps and Aspirin allergy, they may develop severe asthma attacks.