Allfen CX

Generic name:carbetapentane and guaifenesin [ kar-BET-a-PEN-tane, and-gwye-FEN-e-sin ]
Brand names: Allfen C, Allfen CX, Xpect-AT
Drug class:Upper respiratory combinations

Medically reviewed by Drugs.com on Jul 22, 2021. Written by Cerner Multum.

What is Allfen CX?

Carbetapentane is a cough suppressant. It affects the signals in the brain that trigger cough reflex.

Guaifenesin is an expectorant. It helps loosen mucus congestion in your chest and throat, making it easier to cough out through your mouth.

Allfen CX is a combination medicine used to treat stuffy nose, cough, and chest congestion caused by the common cold or flu.

Allfen CX will not treat a cough that is caused by smoking, asthma, or emphysema.

Allfen CX may also be used for purposes not listed in this medication guide.

Warnings

Do not use this medicine if you have used an MAO inhibitor in the past 14 days, such as isocarboxazid, linezolid, methylene blue injection, phenelzine, rasagiline, selegiline, or tranylcypromine.

Before taking this medicine

Do not use Allfen CX if you have taken an MAO inhibitor in the past 14 days. A dangerous drug interaction could occur. MAO inhibitors include isocarboxazid, linezolid, phenelzine, rasagiline, selegiline, and tranylcypromine.

You should not use Allfen CX if you are allergic to carbetapentane or guaifenesin.

To make sure Allfen CX is safe for you, tell your doctor if you have:

• asthma, emphysema, or other breathing problems;

• heart disease or high blood pressure;

• glaucoma;

• diabetes;

• an enlarged prostate or urination problems; or

• overactive thyroid.

It is not known whether Allfen CX will harm an unborn baby. Tell your doctor if you are pregnant.

Carbetapentane and guaifenesin can pass into breast milk and may harm a nursing baby. Tell your doctor if you are breast-feeding a baby.

Artificially sweetened liquid cough or cold medicine ma...