Do not take more of this medication than is recommended. An overdose of acetaminophen can damage your liver or cause death.
In rare cases, acetaminophen may cause a severe skin 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.
Acetaminophen and butalbital may be habit-forming. Misuse can cause addiction, overdose, or death.