Since you have had a Stroke in the past, medicines like Clopitab-A (which contains Aspirin and clopidogrel) are very important to prevent another stroke by keeping the blood from forming clots. Although aspirin can have side effects such as stomach irritation or a small risk of bleeding, the benefit of preventing a serious event like another stroke is usually much greater, especially when taken under medical supervision. Do not stop this medicine on your own, as it can increase your risk of another stroke; instead, continue it as prescribed and consult your doctor if you have symptoms like stomach pain, black stools, or unusual bleeding, as they may adjust the dose or add medicines to protect your stomach.