Key takeaways
Alka-Seltzer (citric acid/aspirin/sodium bicarbonate) and Nyquil Cold and Flu (acetaminophen/dextromethorphan/doxylamine) are both over-the-counter medications used to relieve symptoms like headache and body aches. However, they belong to different medication classes and treat different conditions. Alka-Seltzer is an antacid and NSAID combination used for heartburn, indigestion, and pain relief, while Nyquil Cold and Flu is an analgesic, cough suppressant, and antihistamine combination used for cold and flu symptoms like cough, sore throat, and fever. Alka-Seltzer comes as dissolvable tablets, while Nyquil is available in liquid and capsule forms. Alka-Seltzer contains aspirin, which can cause stomach bleeding and is not recommended for children under 12 due to the risk of Reye's syndrome. Nyquil contains acetaminophen, which can cause liver damage if taken in excess or with alcohol. Both medications can cause drowsiness, but Nyquil is more likely to make you sleepy due to the antihistamine doxylamine. Be cautious of drug interactions, especially with other medications containing similar ingredients.
