Anti-Tuss, GG-Cen, Glyceryl Guaiacolate, Glycotuss, Glytuss, Guiatuss, Humibid, Hytuss, Malotuss, Mytussin, Mucinex, Resyl , Robitussin
Classifications: expectorant; Therapeutic: expectorant
Pregnancy Category: C
100 mg/5 mL syrup; 100 mg/5 mL, 200 mg/5 mL liquid; 200 mg capsules; 300 mg sustained release capsules; 100 mg, 200 mg, 1200 mg tablets; 600 mg sustained release tablets
Enhances reflex outflow of respiratory tract fluids by irritation of gastric mucosa.
Aids in expectoration by reducing adhesiveness and surface tension of secretions.
To combat dry, nonproductive cough associated with colds and bronchitis. A common ingredient in cough mixtures.
Hypersensitivity to guaifenesin; pregnancy (category C), lactation. Cough due to CHF, ACE inhibitor therapy, or tobacco
Chronic cough; asthma; lactation.
Route & Dosage
Adult: PO 200400 mg q4h up to 2.4 g/d
Child: PO <2 y, 12 mg/kg/d in 6 divided doses; 25 y, 50100 mg q4h up to 600 mg/d; 611 y, 100200 mg q4h up to 1.2 g/d
- Ensure that sustained release form of drug is not chewed or crushed. It must be swallowed whole.
- Follow dose with a full glass of water if not contraindicated.
- Carefully observe maximum daily doses for adults and children.
Adverse Effects (≥1%)GI:
Low incidence of nausea. CNS:
Diagnostic Test Interference
Guaifenesin may produce color interference with certain laboratory determinations of urinary 5-hydroxyindoleacetic acid (5-HIAA) and vanillylmandelic acid (VMA).
By inhibiting platelet function, guaifenesin may increase risk of hemorrhage in patients receiving heparin
Assessment & Drug Effects
- Monitor for therapeutic effectiveness. Persistent cough may indicate a serious condition requiring further diagnostic work.
- Notify physician if high fever, rash, or headaches develop.
Patient & Family Education
- Increase fluid intake to help loosen mucus; drink at least 8 glasses of fluid daily.
- Contact physician if cough persists beyond 1 wk.
- Contact physician if high fever, rash, or headache develops.