Carbetapentane, guaifenesin, and phenylephrine

This medicine may cause blurred vision or impair your thinking or reactions. Be careful if you drive or do anything that requires you to be alert and able to see clearly.

Drinking alcohol can increase certain side effects of carbetapentane, guaifenesin, and phenylephrine.

Avoid becoming overheated or dehydrated during exercise and in hot weather. Carbetapentane, guaifenesin, and phenylephrine can decrease sweating and you may be more prone to heat stroke.

Ask a doctor or pharmacist before using any other cold, allergy, cough, or sleep medicine. Antihistamines, decongestants, and cough suppressants are contained in many combination medicines. Taking certain products together can cause you to get too much of a certain drug. Check the label to see if a medicine contains an antihistamine, decongestant, or cough suppressant.

Ask a doctor or pharmacist before using this medicine if you are also using any other drugs, including prescription and over-the-counter medicines, vitamins, and herbal products. Some medicines can cause unwanted or dangerous effects when used together. Not all possible interactions are listed in this medication guide.

Taking this medicine with other drugs that make you sleepy or slow your breathing can worsen these effects. Ask your doctor before taking carbetapentane, guaifenesin, and phenylephrine with a sleeping pill, narcotic pain medicine, muscle relaxer, or medicine for anxiety, depression, or seizures.