Most common side affects reported were stomach pain, runny or stuffy nose, mild headaches, dizziness, and sore throat. Stop taking this medication and contact a local physician immediately if reactions such as nosebleeds, bloody stools, numbness or weakness on one side of the body, chest pains, or vision problems occur after you buy Plavix. Cheap Plavix tablets are effective for many patients but can result in more serious conditions, so it is important to follow up with a local physician.