Generic Name(s): guaifenesin/phenylephrine
Drug Class: Upper respiratory combinations
Treats: Cough, chest congestion, stuffy nose
Phenavent is a combination of guaifenesin and phenylephrine. It is a decongestant and an expectorant. It is used in the treatment of chest congestion, cough and stuffy nose that is commonly caused by the common cold, allergies, breathing illnesses and hay fever.
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Hay fever and allergic rhinitis occur together in many cases. Their signs and symptoms include nasal congestion, clear runny nose, sneezing, itching of the eyes and nose and excess production of the tears. Phenavent is used to treat:
- Chest congestion
- Stuffy nose
These occur due to the common cold, allergies, breathing illnesses and hay fever. Hay fever is an allergy that takes place as a result of the pollen or dust exposure where the eyes and nose mucous membranes become itchy and inflamed leading to a runny nose and watery eyes.
Guaifenesin works by loosening and thinning of the mucus in the lungs making it easier to cough up the mucus. Phenylephrine works by relieving symptoms of a stuffy nose.
Follow all the instructions as written on your medicine label, if you are taking Phenavent over the counter. Consult your pharmacist if you have any query. Additionally, follow your doctor's directions if he or she prescribed the medicine for you. Administer the tablet, capsule or liquid form of this drug by mouth without any food consideration. If stomach upset occurs, take the medicine with food. Children under the age of 6 should not take Phenavent or other cough and cold products. Below you will find a typical dosage of Phenavent.
Adult dosage for cough and nasal congestion
- Take 15 mg dextromethorphan, 300 mg phenylephrine and phenylephrine 10 mg/5 mL
Phenavent Side Effects
Just like any other drug Phenavent has unwanted effects as well. Some of those effects may disappear with time and may not need any medical attention. Others may persist and become more annoying to the user. Diarrhoea, dizziness and drowsiness have been reported as some of the most common side effects of this medication. Call your doctor for help immediately you detect the following serious side effects
- urinating difficulties
- persistent dizziness
- slow or irregular heartbeat
- mental or mood changes
Like any drug, Phenavant may interact with other drugs and substances. In some cases, certain drug combinations are not recommended. This is because the two or more combined drugs are likely to interact which may increase the severity of your side effects. However, you can prevent such incidences by letting your doctor know about any other type of drug you are using whether medicated or not. Some of the commonly checked medications in combination with Phenavent include the following. Note that not all possible Phenavent interactions are listed.
- Klonopin (Clonazepam)
- Tylenol (acetaminophen)
- Novolog (mometason nasal)
- Lantus (insulin glargine)
- Flexeril (cyclobenzaprine)