What are the possible side effects of acetaminophen, codeine, guaifenesin, and phenylephrine?
• fast, pounding, or uneven heartbeat; • slow heart rate, weak pulse, fainting, weak or shallow breathing; • confusion, hallucinations; • severe dizziness, anxiety, restless feeling, or nervousness; • increased blood pressure (severe headache, blurred vision, trouble concentrating, chest pain, numbness, seizure); 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 may include: • dizziness, headache; • constipation; • mild nausea, vomiting, or stomach upset; • mild loss of appetite; • skin rash or itching; • warmth, tingling, or redness under your skin; • feeling excited or restless; or • sleep problems (insomnia).This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088. You may report side effects to FDA at 1-800-FDA-1088.What other drugs will affect acetaminophen, co
