Generic Name(s): Guaifenesin
Drug Class: decongestant
Treats: Nasal congestion ,cough
Fenesin is used to treat congestion and cough caused by bronchitis and common cold .The generic name is Guaifenesin and Phenylephrine. Guaifenesin is an expectorant which helps loosen congestion in the chest and throat. Phenylephrine is a decongestant that shrinks blood vessels in the nasal passage. Nasal congestion can be cauised by dilated blood vessels.
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Fenesin is not used for a long-term breathing problem caused by emphysema and chronic bronchitis or an on- going cough from smoking. Fenesin works by;
- Loosening mucus
- Clearing congestion
- Making breathing easier
- Treating cough
This medication is not advisable for children under the age of 6 years and as for long-acting capsules or tablets not children younger than 12 years. This medication does not shorten the length of the disease neither does it cure it. You should avoid taking any other cough and cold medication containing the same products. This can lead to a high risk of increase of the side effects.
Fenesin is taken by mouth with or without food and is mostly taken after every 4 hours. You should follow the prescription as directed if self treating. Fenesin has a bitter taste hence it is advisable to swallow the capsule/tablet whole and not to chew or crash it. Abuse of this medication may lead to serious brain damage, seizure and also death. The usual Fenesin dosage for cough is follows;
- Immediate release formulation (less than 2 years) - 200 to 400 mg orally every four hours and not exceeding 2.4 g/day
- Sustained release formulation (2 years and above) - 600 to 1200 mg orallyery 12 hours not exceeding 2.4 g/day
Fenesin can be found in different forms:
- Oral granule
- Oral tablet
- Extended release
- Oral liquid
- Oral capsule
- Oral suspension
The dosage is administered according to the medical condition, age and response to treatment.
Fenesin Side Effects
Like every other drug, Fenesin has its side effects which some of them are common and others are serious. If any of this side effects show consult your doctor for further advice:
- Trouble breathing
- Swelling of the face and throat
- Severe dizziness
- Persistent headache
- Swelling of the mouth and lips
- Tightness in the chest
- Visual and auditory hallucinations.
Most of the patients who have used this medication do not experience serious side effects.
The effectiveness of Fenesin can change if taken together with other drugs. This can lead to the medication not working as intended and it increases the risk for serious side effects. Before starting medication you should inform your doctor on any other drug you had been using including the herbal products. Some of the drugs that interact majorly with Fenesin include:
- Sodium biophosphate