In serious cases, an overdose could increase the risk of bleeding, including dangerous internal bleeding, such as gastrointestinal
bleeding or
bleeding in the brain. Symptoms of such
bleeding may include:
Easy bruising or bleeding
Black, tarry stools; bright red blood in the stool; or vomiting of blood (signs of gastrointestinal bleeding)
Signs of a hemorrhagic stroke (bleeding in the brain), such as vision or speech changes, weakness or numbness in an arm or leg, or a severe headache.