What are the possible side effects of aspirin, butalbital, caffeine, and codeine?
• shallow breathing, slow heart rate; • fast or pounding heart rate, muscle twitching; • confusion, unusual thoughts or behavior; • black, bloody, or tarry stools; • coughing up blood or vomit that looks like coffee grounds; • problems with urination; or • nausea, stomach pain, low fever, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes). Less serious side effects include: • feeling dizzy, shaky, anxious, or agitated; • heartburn, mild nausea, vomiting, upset stomach, constipation, diarrhea; • mood changes, sleep problems (insomnia); • sweating, urinating more than usual; or • ringing in your ears, blurred vision, or dry mouth. Other side effects may also occur. Tell your doctor about any unusual or bothersome side effect.
