Guaiphenesin Pharmacology


About Guaiphenesin
Propanediol derivative, Expectorant.
Mechanism of Action of Guaiphenesin
Guaiphenesin is an expectorant which after absorption from the gastrointestinal tract secreted by tracheobronchial glands and directly increase bronchial secretion and mucosal ciliary action. It increases respiratory tract fluid by reducing adhesiveness and surface tension, reducing viscosity of the secretions and there by facilitating their removal and clears chest congestion.
Action in local vaginal preparations: Guaiphenesin helps to thin the thick or sticky cervical mucus.

Pharmacokinets of Guaiphenesin
Absorption: Well absorbed orally.Distribution: It is secreted by the tracheobronchial glands.
Metabolism: It is metabolized primarily to Beta-2-methoxyphenoxy-lactic acid. Excretion: It is excreted in the urine.
Onset of Action for Guaiphenesin
Duration of Action for Guaiphenesin
Half Life of Guaiphenesin
60 minutes
Side Effects of Guaiphenesin
1. Headache
2. Dizziness
3. Nausea
4. Vomiting
5. Rash
6. Diarrhoea
7. Drowsiness
8. Stomach pain
Contra-indications of Guaiphenesin
1. Hypersensitivity to the drug
2. Chronic or persistent cough associated with chronic lower respiratory tract diseases
3. Asthma
4. Bronchitis
5. Chronic obstructive pulmonary disease (COPD)
6. Emphysema
Special Precautions while taking Guaiphenesin
1. Porphyria
Pregnancy Related Information
Use with caution
Old Age Related Information
Use with caution
Breast Feeding Related Information
Children Related Information
May be used
Indications for Guaiphenesin
1. Expectorant
2. Thick or sticky cervical mucus
Interactions for Guaiphenesin
Typical Dosage for Guaiphenesin
Oral :
Adults and children over 12 years: 100 to 400mg up to 6 times daily as required.Maximum dose: 2.4g/day
Children (age 6 to 11): 100 to 200mg up to 6 times daily as required.Maximum dose: 1.2g/day
Children (age 2 to 5): 50 to 100mg up to 6 times daily as required.Maximum dose: 600mg/day
Extended release:
Adults and children over 12 years: 600 to 1200mg twice daily. Not to exceed 2.4g in 24 hours
Children (age 6 to 12): 600mg twice daily. Not to exceed 1.2g in 24 hours
Children (age 2 to 6): 300mg twice daily. Not to exceed 600mg in 24 hours
Thick or sticky cervical mucus: 200mg 2 to 3 times daily from 4 days prior to ovulation and continue through ovulation day.
Schedule of Guaiphenesin
Storage Requirements for Guaiphenesin
Store at a temperature below 30 degree C. Keep out of reach of children.
Effects of Missed Dosage of Guaiphenesin
Take the missed dose as soon as noticed and if it is the time for next dose then skip the missed dose. Continue the regular schedule. Do not double the dose.
Effects of Overdose of Guaiphenesin
Provide symptomatic treatment and supportive measures.

Home Delivery for Guaiphenesin in Your City

Medicine India is just a publishing medium for medicine related information and does not provide services or sales of medicines including guaiphenesin.

However, we do publish a comprehensive directory of Pharmacies, Chemists and Druggists in cities all over India. You can use this directory to find the medicine stores in your city (or area) that provide home delivery services for guaiphenesin and other medicines and health products. Home delivery services for guaiphenesin may be free or they may cost you depending on the pharmacy and the minimum order requirements. It would be best to get this clarified while placing the order.

Please be aware that you should take guaiphenesin only if a doctor has recommended or prescribed it. Some or all pharmacies who provide a home delivery service for medicines might insist on a prescription for guaiphenesin before they complete the sale. You can get this information while placing the order for guaiphenesin with the pharmacy.

Guaiphenesin is a generic medicine name and there are several brands available for it. Some of the brands for guaiphenesin might be better known than guaiphenesin itself. If the pharmacy that's willing to deliver medicines to your home doesn't have guaiphenesin in stock, you can ask for one of the branded alternatives for guaiphenesin.