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Treats cough and stuffy nose caused by hay fever or the common cold. Also thins mucus to make a cough more productive. This medicine is a combination of an expectorant and a decongestant.

Brand Names

New Ami-Tex LA
Ami-Tex LA
Crantex LA
GFN 1200/Phenylephrine 40
GFN 800/PE 25
Duraphen II
Prolex PD
PhenaVent LA
Deconsal II
Liquibid-D 1200
PhenaVent D

When You Should Not Take The Medication

You should not use this medicine if you have had an allergic reaction to guaifenesin or phenylephrine, or to other cold medicines, diet pills, or medicines to treat asthma, bronchitis, or attention deficit disorder. You should not use this medicine if you have used an MAO inhibitor (MAOI) such as Eldepryl®, Marplan®, Nardil®, or Parnate® within the past 14 days. You should not use this medicine if you have high blood pressure, heart or blood vessel disorders, or overactive thyroid.

How To Store And Dispose Of This Medicine

Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Do not refrigerate or freeze the liquid form of this medicine.

Ask your pharmacist, doctor, or health caregiver about the best way to dispose of any leftover medicine after you have finished your treatment. You will also need to throw away old medicine after the expiration date has passed.

Keep all medicine away from children and never share your medicine with anyone.

Possible Side Effects While Using This Medicine

Call your doctor right away if you notice any of these side effects:
Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing.
Fast, pounding, or uneven heartbeat.
Feeling extremely confused, fearful, or anxious.
High fever, skin rash, sore throat, ongoing headache.
Lightheadedness or fainting.
No improvement in your symptoms after using the medicine for 7 days.
Seizure, hallucinations, vomiting.
Shallow breathing, pale skin.
Unusual weakness, tremors, or shaking.

If you notice these less serious side effects, talk with your doctor:
Anxiety, fear, depression, nervousness.
Dizziness, trouble sleeping.
Feelings of excitement, elevated mood, or increased energy.
Loss of appetite.
Mild fever or headache.

If you notice other side effects that you think are caused by this medicine, tell your doctor.