Medications and Drugs
Brand Names: Alka-Seltzer Plus Night Time Cold Liquigel, All-Nite Multi-Symptom Cold/Flu Relief, Multi-Symptom Nighttime, NyCair, Nyquil Cold Medicine, NyQuil D, Nyquil Liquicap, Robitussin Night Cold, Theraflu Nighttime Severe Cold (pseudoephedrine)
Generic Name: acetaminophen, dextromethorphan, doxylamine, and pseudoephedrine (Pronunciation: a SEET a MIN o fen, DEX troe meth OR fan, dox IL a meen, SOO doe e FED rin)
What is acetaminophen, dextromethorphan, doxylamine, and pseudoephedrine (Alka-Seltzer Plus Night Time Cold Liquigel, All-Nite Multi-Symptom Cold/Flu Relief, Multi-Symptom Nighttime, NyCair, Nyquil Cold Medicine, NyQuil D, Nyquil Liquicap, Robitussin Night Cold, Theraflu Nighttime Severe Cold (pseudoephedrine))?
Doxylamine is an antihistamine that reduces the effects of the natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itching, watery eyes, and runny nose.
Pseudoephedrine is a decongestant that shrinks blood vessels in the nasal passages. Dilated blood vessels can cause nasal congestion (stuffy nose).
The combination of acetaminophen, dextromethorphan, doxylamine, and pseudoephedrine is used to treat headache, fever, body aches, cough, runny nose, sneezing, itching, and watery eyes caused by allergies, the common cold, or the flu.
Acetaminophen, dextromethorphan, doxylamine, and pseudoephedrine may also be used for purposes not listed in this medication guide.
What are the possible side effects of this medicine?
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Stop using this medication and call your doctor at once if you have a serious side effect such as:
Less serious side effects may include:
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.
What is the most important information I should know about this medicine?
Do not take more of this medication than is recommended. An overdose of acetaminophen can damage your liver or cause death. Do not take this medication without a doctor's advice if you have ever had alcoholic liver disease (cirrhosis) or if you drink more than 3 alcoholic beverages per day.
You should not use this medicine if you have severe constipation, a blockage in your stomach or intestines, or if you are unable to urinate.
Do not use this medicine if you have used an MAO inhibitor such as furazolidone (Furoxone), isocarboxazid (Marplan), phenelzine (Nardil), rasagiline (Azilect), selegiline (Eldepryl, Emsam, Zelapar), or tranylcypromine (Parnate) in the last 14 days. A dangerous drug interaction could occur, leading to serious side effects.
Avoid drinking alcohol. It may increase your risk of liver damage while you are taking acetaminophen, and can increase certain side effects of doxylamine.
Ask a doctor or pharmacist before using any other cold, allergy, pain, or sleep medication. Acetaminophen (sometimes abbreviated as APAP) is contained in many combination medicines. Taking certain products together can cause you to get too much acetaminophen which can lead to a fatal overdose. Check the label to see if a medicine contains acetaminophen or APAP.
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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