Generic Name(s): codeine, guaifenesin, and pseudoephedrine
Drug Class: Upper respiratory combinations
Treats: Cold symptoms
Phenhist (codeine, guaifenesin, and pseudoephedrine) is a medication that is used to treat chest congestion, sinus congestion, cough, and stuffy nose caused by the flu, common cold and other breathing illness. It is supplied in the form of solution, tablets or capsules and should be administered orally through the mouth.
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Phenhist is a combination drug used as a treatment of various symptoms caused by common cold and other upper respiratory infections. Phenhist is a combination of three medicines - codeine, guaifenesin, and pseudoephedrine. ;
Guaifenesin is the expectorant agent that clears nasal congestion by loosening and thinning mucus in the airways to allow easy breathing. Pseudoephedrine is the decongestant agent in this combination that works by constricting the blood vessels in the nasal passages to reduce nasal congestion. Codeine is the cough suppressant in Phenhist, and it works in the brain to by triggering cough reflex.
Conditions that Phenhist can be used for,
- Cough symptoms
- Nasal congestion
- Treating upper respiratory infections
- Allergic conditions
Phenhist must be administered as prescribed by the physician. It can be a sensitive drug if it is not used as per the instructions. The drug is supplied with clear instructions from the manufacturer describing how it should be administered. The patient should never take Phenhist in a large amount to avoid severe healthy complications. It is only for the oral administration.
Usual adult dosage for cold symptom:
- Tablet; 1 tablet orally every 4 to 6 hours. Max dose; 6 tablets a day.
- Liquid; 10 mL orally every 4 to 6 hours. Max dose; 40 mL in 24 hours.
Usual pediatric dosage for;cold symptoms:
- 2 - 5 years; 2.5 mL orally every 6 hours. Max dose; 10 mL a day.
- 6 - 12 years; 5 mL orally every 6 hours. Max dose; 20 mL doses a day.
- 13 and above; adult dosage.
Phenhist Side Effects
Phenhist is known for causing several side effects. The severity of the side effect is mostly determined by the way a patient responds to the medication. The fact that this drug is also supplied as a liquid, there is always a possibility of the patient taking it in a large amount or overdosing than prescribed. Drug abuse is indeed one of the main causes of Phenhist severe side effects.
Phenhist common side effects:
- Loss of appetite
- Dry mouth
- Trouble sleeping
Severe side effects:
- severe high blood pressure
- Difficulty in urinating
- Severe dizziness
- Tightness in the chest
- Swelling of the mouth
- Vision changes
Phenhist has been confirmed to interact with several drugs and thus you must be very careful when you are under its medication. Not many people have the idea that not all medicines can be combined and that some can have serious interactions. Avoid taking Phenhist when you are under another treatment unless you have been advised by your physician.
These are the interacting drugs:
- Bontril PDM
- Atrosept Belviq
- Elavin Endep