On this page · 8 sections
Deconex
Generic name: guaifenesin and phenylephrine
Brand names: Deconex IR, Despec, ED Bron GP, Gilphex TR, Giltuss Sinus and Congestion, Maxi-Tuss PE Jr, Mucinex Children's Stuffy Nose and Chest Congestion, Mucus Relief Sinus, Rescon-GG, Supress-PE, Aldex G, Aquatab D, D-Phen 1000, Deconex, Donatussin Drops, Duravent PE, Liquibid-PD, MucaphEd, Nariz, Prolex D
What is Deconex?
Deconex is a combination medicine used for adults and children to treat allergy symptoms like a runny or stuffy nose, sneezing, watery eyes, itching in the nose and throat, cough with mucus, sinus pain, and to lessen chest congestion from the common cold, hay fever, or other allergies.
There are many brands and forms of guaifenesin and phenylephrine available, and not all brands are mentioned in this leaflet.
Deconex may also be used for reasons not included in this medication guide.
This section was rewritten for readability and reviewed for meaning.
How should I take Deconex?
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 Deconex 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.
This section was rewritten for readability and reviewed for meaning.
Warnings
Do not use Deconex if you have taken an MAO inhibitor in the past 14 days. A dangerous drug interaction could happen. MAO inhibitors include isocarboxazid, linezolid, methylene blue injection, phenelzine, and tranylcypromine.
Taking more than your recommended dose will not make Deconex work better and may cause serious side effects.
This section was rewritten for readability and reviewed for meaning.
Before taking this medicine
Do not use Deconex if you have taken an MAO inhibitor in the last 14 days. A dangerous drug interaction could happen. MAO inhibitors include isocarboxazid, linezolid, methylene blue injection, phenelzine, and tranylcypromine. Wait at least 14 days after stopping an MAO inhibitor before taking this medicine.
Tell your doctor if you have or have ever had:
- high blood pressure;
- heart disease;
- diabetes;
- a thyroid disorder;
- urination problems due to an enlarged prostate; or
- a cough with mucus or a chronic cough caused by smoking, asthma, chronic obstructive pulmonary disease (COPD), or another 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.
This section was rewritten for readability and reviewed for meaning.
Deconex side effects
Get emergency medical help if you notice signs of an allergic reaction: hives, trouble breathing, swelling of your face, lips, tongue, or throat.
Deconex may cause serious side effects. Stop using Deconex and contact your doctor immediately if you experience:
- nervousness, dizziness, trouble sleeping (insomnia).
This is not a complete list of side effects, and other side effects may happen. Contact your doctor for medical advice about side effects. You can report side effects to the FDA at 1-800-FDA-1088.
This section was rewritten for readability and reviewed for meaning.
What happens if I miss a dose?
Deconex is used as needed. If you miss a dose while on a dosing schedule, skip that dose. Do not take two doses at the same time.
This section was rewritten for readability and reviewed for meaning.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
- Ask a doctor or pharmacist before taking other cough or cold medicines that may contain similar ingredients.
This section was rewritten for readability and reviewed for meaning.
What other drugs will affect Deconex?
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.
This section was rewritten for readability and reviewed for meaning.
Related medicines
Content is provided for education and is not medical advice. See our medical disclaimer.