 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  risk of side effects will increase. Also, do not stop using this medication unless directed by your doctor. The dosage is based on your medical condition, weight, and response to treatment. Use this medication regularly to get the most benefit from it. To help you remember, take it at the same time each day.The side effects of Effient Oral: Headache, nausea, nosebleed, and stomach upset may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly. Remember that this medication has been prescribed because your doctor has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. This medication can cause serious bleeding. Tell your doctor right away if you have any signs of serious bleeding, including: nosebleeds that happen often or don't stop, unusual pain/swelling/discomfort, unusual bruising, prolonged bleeding from cuts or gums, unusually heavy/prolonged menstrual flow, coughing up blood, bloody/black/tarry stools, bloody urine, vomit that is bloody or looks like coffee grounds, severe headache, dizziness/fainting, shortness of breath, chest pain, difficulty swallowing. Prasug </s>