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Guaifenesin and Phenylephrine
What is it? Overview Usage Side Effects and Warnings

Guaifenesin and Phenylephrine Overview

Written by FoundHealth.

(gwye FEN e sin & fen il EF rin)

U.S. Brand Names

Aldex™; Crantex LA; D-Phen 1000; Deconsal® II; Donatussin Drops; Duomax; Duratuss GP®; Duratuss®; ExeFen-PD; ExeTuss [DSC]; ExeTuss-GP; Fenesin PE IR; Genexa™ LA [DSC]; Gentex LA [DSC]; Gilphex TR® [DSC]; Guaifed-PD®; Guaifed®; Guaiphen-D; Guaiphen-D 1200; Guaiphen-PD; Liquibid-D®; Mucinex® Cold [OTC]; MyDex; Nexphen PD; norel® EX; Pendex; PhenaVent™ D [DSC]; PhenaVent™ LA [DSC]; PhenaVent™ Ped [DSC]; PhenaVent™ [DSC]; Prolex®-D [DSC]; Prolex®-PD [DSC]; Refenesen™ PE [OTC]; Rescon GG [OTC]; Respa® PE [DSC]; Sil-Tex; Simuc [DSC]; Sina-12X; SINUvent® PE; XPECT-PE™ [DSC]

Pharmacologic Category

Decongestant; Expectorant

What key warnings should I know about before taking this medicine?

• This medicine does not mix well with many medicines. Serious reactions may occur. Check all medicines with healthcare provider.

Reasons not to take this medicine

• If you have an allergy to guaifenesin, phenylephrine, or any other part of this medicine.

• Tell healthcare provider if you are allergic to any medicine. Make sure to tell about the allergy and how it affected you. This includes telling about rash; hives; itching; shortness of breath; wheezing; cough; swelling of face, lips, tongue, or throat; or any other symptoms involved.

• If you have any of the following conditions: Fast heartbeat or uncontrolled high blood pressure.

• If you have taken isocarboxazid, phenelzine, or tranylcypromine in the last 14 days. Monoamine oxidase inhibitors (eg, isocarboxazid, phenelzine, and tranylcypromine) must be stopped 14 days before this medicine is started. Taking the two together could cause dangerously high blood pressure.

How does it work?

• Guaifenesin thins fluids in the lungs.

• Phenylephrine shrinks swollen nasal tissue and opens up passages.

How is it best taken?

• Take this medicine with a full glass of water.

• Drink plenty of noncaffeine-containing liquid unless told to drink less liquid by healthcare provider.

• Long-acting products: Swallow whole. Do not chew, break, or crush.

What do I do if I miss a dose? (does not apply to patients in the hospital)

• Take a missed dose as soon as possible.

• If it is almost time for the next dose, skip the missed dose and return to your regular schedule.

• Do not take a double dose or extra doses.

• Many times this medicine is taken on an as needed basis.

What should I monitor?

• Change in condition being treated. Is it better, worse, or about the same?

• Take good care of your teeth. See a dentist regularly.

How should I store this medicine?

• Store at room temperature.

• Protect from light.

• Protect from moisture. Do not store in a bathroom or kitchen.

General statements

• If you have a life-threatening allergy, wear allergy identification at all times.

• Do not share your medicine with others and do not take anyone else's medicine.

• Keep all medicine out of the reach of children and pets.

• Most medicines can be thrown away in household trash after mixing with coffee grounds or kitty litter and sealing in a plastic bag.

• Keep a list of all your medicines (prescription, natural products, supplements, vitamins, over-the-counter) with you. Give this list to healthcare provider (doctor, nurse, nurse practitioner, pharmacist, physician assistant).

• Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or in Canada to Health Canada's Canada Vigilance Program at 1-866-234-2345.

• Talk with healthcare provider before starting any new medicine, including over-the-counter, natural products, or vitamins.

Created: 2006-10-13 12:57:16.0

Modified: 2010-03-19 12:06:32.0

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