Symptoms of a NyQuil overdose include loss of appetite, nausea, vomiting, confusion, flushing, fatigue, seizures, hallucinations, stomach ache, loss of coordination and agitation, states WebMD. NyQuil liquid includes four active ingredients: acetaminophen, dextromethorphan, doxylamine and pseudoephedrine, according to Drugs.com. These ingredients treat symptoms of colds, allergies and respiratory infections.Know More
As a brand, NyQuil formulas vary depending on the particular product. All products labeled NyQuil include alcohol, antihistamines or hypnotics. Different NyQuil formulas have been termed NyQuil D, NyQuil Cold/Flu Multisymptom Relief, NyQuil Sinus, NyQuil Cough, Children's NyQuil and ZzzQuil, according to Wikipedia.
Dextromethorphan is the most common ingredient in NyQuil products. Dextromethorphan is a cough suppressant that is poisonous in high doses. Symptoms of a dextromethorphan overdose include dizziness, breathing problems, hallucinations, muscle twitches, hyperthermia, coma, nausea, rapid heart beat, blurred vision and vomiting, according to the New York Times' Health Guide.
Doxylamine is the second most common ingredient in NyQuil products. Doxylamine is an antihistamine and sedative used to treat colds and allergies in combination with other drugs. Symptoms of a doxylamine overdose include insomnia, night terrors, dilated pupils, dry mouth, euphoria, hallucinations, seizures and death, according to Wikipedia. DayQuil is another formulation created by the same company as NyQuil. DayQuil differs from NyQuil in its lack of drowsiness-inducing antihistamines.Learn more about Side Effects
The active ingredients in NyQuil are acetaminophen, dextromethorphan HBr and doxylamine succinate. NyQuil also contains a number of inactive ingredients.Full Answer >
WebMD states that the possible side effects of branched-chain amino acids include nausea, fatigue and loss of coordination. Additionally, BCAAs may adversely affect individuals who suffer from chronic alcoholism and Lou Gehrig's disease. Overall, however, BCAAs are generally considered safe to use for most people for a period of no longer than six consecutive months.Full Answer >
Potassium, when taken in the prescribed dosage amount, can lead to mild gastrointestinal side effects such as nausea, diarrhea and stomach ache, according to WebMD. However, taking potassium in dosages exceeding the maximum recommended amount can lead to serious side effects including extreme fatigue, paralysis and in some cases, death.Full Answer >
The ingredient in NyQuil that causes users to sleep is an antihistamine called doxylamine. The strong sedative power of antihistamines causes them to be used as active ingredients in many cold medicines and sleep aids, according to LiveScience.Full Answer >