Generic name: guaifenesin and phenylephrine [ gwye-FEN-e-sin-and-FEN-il-EFF-rin ]
Brand names: Deconex IR, Despec, ED Bron GP, Gilphex TR, Giltuss Sinus and Congestion, ... show all 28 brands
Drug class: Upper respiratory combinations
What is Gilphex TR?
Gilphex TR is a combination medicine used in adults and children to treat allergy symptoms such as runny or stuffy nose, sneezing, watery eyes, itching of nose and throat, cough with mucus, sinus pain, and to reduce chest congestion caused by the common cold, hay fever, or other allergies.
Gilphex TR may also be used for purposes not listed in this medication guide.
Gilphex TR side effects
Get emergency medical help if you have signs of an allergic reaction: hives, difficult breathing, swelling of your face, lips, tongue, or throat.
Gilphex TR may cause serious side effects. Stop using Gilphex TR and call your doctor at once if you have:
nervousness, dizziness, sleep problems (insomnia).
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
Do not use Gilphex TR if you have used an MAO inhibitor in the past 14 days. A dangerous drug interaction could occur. MAO inhibitors include isocarboxazid, linezolid, methylene blue injection, phenelzine, and tranylcypromine.
Taking more than your recommended dose will not make Gilphex TR more effective, and may cause serious side effects.
Before taking this medicine
Do not use Gilphex TR if you have used an MAO inhibitor in the past 14 days. A dangerous drug interaction could occur. MAO inhibitors include isocarboxazid, linezolid, methylene blue injection, phenelzine, and tranylcypromine. Wait at least 14 days after stopping an MAO inhibitor before you take this medicine.
Tell your doctor if you have or have ever had:
a thyroid disorder;
urination problems due to an enlarged prostate; or
cough with mucus or chronic cough cause by smoking, asthma, chronic obstructive pulmonary disease (COPD) or other breathing disorder.
Ask your doctor before using this medicine if you are pregnant or breastfeeding.
Do not give this medicine to a child without medical advice.
How should I take Gilphex TR?
Use exactly as directed on the label, or as prescribed by your doctor. Cold or cough medicine is only for short-term use.
Follow all directions when giving Gilphex TR to a child. Do not use the medicine to make a child sleepy. Misuse of this medicine may cause death in very young children.
Measure liquid medicine with the supplied measuring device (not a kitchen spoon).
Take the tablet with a full glass of water.
Your dose needs may change if you switch to a different brand, strength, or form of this medicine. Avoid medication errors by using exactly as directed on the label, or as prescribed by your doctor.
Taking more than your recommended dose will not make this medicine more effective, and may cause serious side effects.
Stop using this medicine and call your doctor if your symptoms do not improve or get worse after 7 days, or if you also have a fever, rash, or headaches.
Store at room temperature away from moisture and heat.
What happens if I miss a dose?
Gilphex TR is used when needed. If you are on a dosing schedule, skip any missed dose. Do not use two doses at one time.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
What should I avoid while taking Gilphex TR?
Ask a doctor or pharmacist before taking other cough or cold medicines that may contain similar ingredients.
What other drugs will affect Gilphex TR?
Ask a doctor or pharmacist before using any other medicines that can cause drowsiness (such as opioid medication, sleep medicine, a muscle relaxer, or medicine for anxiety or seizures). Tell your doctor about all other medicines you use. This includes prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed here.
More about Gilphex TR (guaifenesin / phenylephrine)
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Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
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