Acetaminophen, butalbital, caffeine, and codeine side effects
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. 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.
Opioid medicine can slow or stop your breathing, and death may occur. A person caring for you should give naloxone and/or seek emergency medical attention if you have slow breathing with long pauses, blue colored lips, or if you are hard to wake up.
Acetaminophen, butalbital, caffeine, and codeine may cause serious side effects. Call your doctor at once if you have:
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noisy breathing, sighing, shallow breathing;
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a slow heart rate or weak pulse;
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extreme drowsiness, feeling like you might pass out;
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chest pain, fast or pounding heart rate, feeling short of breath;
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confusion, unusual thoughts or behavior;
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high levels of serotonin in the body--agitation, hallucinations, fever, sweating, shivering, fast heart rate, muscle stiffness, twitching, loss of coordination, nausea, vomiting, diarrhea;
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low cortisol levels-- nausea, vomiting, loss of appetite, dizziness, worsening tiredness or weakness; or
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liver problems--nausea, upper stomach pain, itching, tiredness, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes).
Serious breathing problems may be more likely in older adults and those who are debilitated or have wasting syndrome or chronic breathing disorders.
Common side effects include:
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drowsiness, dizziness, feeling "drunk";
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headache, tiredness; or
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nausea, vomiting, stomach pain, constipation.
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.
See more: Acetaminophen, butalbital, caffeine, and codeine Side Effects