Acetaminophen / dextromethorphan Side Effects

Medically reviewed by Drugs.com. Last updated on Dec 27, 2023.

Applies to acetaminophen / dextromethorphan: oral liquid, oral solution, oral suspension.

You should not use this medicine if you have severe liver disease.

Use this medicine exactly as directed. An overdose of acetaminophen can damage your liver or cause death.

Call your doctor at once if you have nausea, pain in your upper stomach, itching, loss of appetite, dark urine, clay-colored stools, or jaundice (yellowing of your skin or eyes).

Stop taking this medicine and call your doctor right away if you have skin redness or a rash that spreads and causes blistering and peeling.

Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

In rare cases, acetaminophen may cause a severe skin reaction that can be fatal. This could occur even if you have taken acetaminophen in the past and had no reaction. Stop taking this medicine and call your doctor right away if you have skin redness or a rash that spreads and causes blistering and peeling. If you have this type of reaction, you should never again take any medicine that contains acetaminophen.

Stop using the medicine and call your doctor at once if you have:

redness or swelling;
new or worsening symptoms;
an ongoing cough with a rash or headache; or
liver problems--loss of appetite, stomach pain (upper right side), tiredness, itching, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes).

Common side effects may include: