Tylenol Cold & Flu Gel Caps are helpful when you have a cold with many symptoms, like a stuffy nose, cough, aches and pains, and a sore throat. Having all of these symptoms at once means that you need a multipurpose medicine that combines different medications to give you the best relief from your symptoms. When taking Tylenol Cold & Flu Gel Caps, it's important to remember to never exceed the dosing instructions found on the box. You'll notice some mild side effects, but if they worsen, you should contact your doctor immediately.
Difficulty Sleeping
The Tylenol website lists a 10 milligram dose of dextromethorphan in a teaspoon of Tylenol Cold & Flu Gel Caps. Dextromethorphan is used as a cough suppressant, but it often causes users to feel impatient, anxious or have trouble sleeping. It may be difficult to go to sleep, or you might feel restless. If you start to feel restless and irrational, contact your doctor about switching to a form of Tylenol that does not contain dextromethorphan.
Irritability
The included dose of dextromethorphan is also to blame for feelings of irritability while taking Tylenol Cold & Flu Gel Caps. This could also be linked to your feelings of anxiety or your sleeplessness. This is another side effect that you should contact your doctor about if it persists longer than a few hours.
Weakness
Drugs.com lists weakness as a common side effect of phenylephrine, the drug that is used as a decongestant in Tylenol Cold & Flu Gel Caps to help drain the fluids from your sinuses and ears. This feeling of weakness may occur along with feeling of fatigue, and feelings of dizziness or faintness.
Stomach Pain and Nausea
While taking a cocktail of different medications is beneficial for treating a large variety of symptoms, like the ones you experience while suffering from a cold as well as the flu, it can also wreak havoc on your stomach. Having too much medication in your system can make you feel slightly nauseous. Making sure you don't take a multipurpose medication on a full stomch can help you feel better. Also, understand that the guaifenesin in the medicine, which is an expectorant, can make you feel sick to your stomach.
Liver Damage
Acetaminophen, the ingredient in Tylenol Cold & Flu Gel Caps that helps ease the aches and pains of the flu, has been linked to liver damage when taken in large doses for too long. The Tylenol website warns that you should never take more than 12 gel caps in 24 hours, and that you should avoid drinking alcohol when taking medications that contain acetaminophen, to avoid liver damage.
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