Alka-Seltzer Plus Severe Allergy Sinus Congestion & Headache Side Effects
Generic Name: acetaminophen / doxylamine / phenylephrine
Note: This document contains side effect information about acetaminophen / doxylamine / phenylephrine. Some of the dosage forms listed on this page may not apply to the brand name Alka-Seltzer Plus Severe Allergy Sinus Congestion & Headache.
Applies to acetaminophen / doxylamine / phenylephrine: oral capsule
Get emergency medical help if you have signs of an allergic reaction: hives; difficulty 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 this medicine and call your doctor at once if you have:
chest pain, rapid pulse, fast or uneven heart rate;
confusion, hallucinations, severe nervousness, tremor, seizure (convulsions);
easy bruising or bleeding, unusual weakness;
little or no urinating;
liver problems--nausea, upper stomach pain, itching, tiredness, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes); or
dangerously high blood pressure--severe headache, blurred vision, pounding in your neck or ears, nosebleed, anxiety.
Side effects such as dry mouth, constipation, and confusion may be more likely in older adults.
Common side effects may include:
mild headache, blurred vision;
dry mouth, nose, or throat;
feeling restless or excited (especially in children); 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.
Some side effects may not be reported. You may report them to the FDA.
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