Chlorhexidine for Sore Throat: Uses, Benefits & Safety Limits

Chlorhexidine (0.12–0.2%) is an antiseptic mouthwash/lozenge/spray used for sore throat relief.

Benefits

• Broad-spectrum antimicrobial (bacteria, fungi, some viruses).
• Reduces bacterial load, inflammation, pain.
• Substantivity: binds to mucosa, lasting effect (up to 12h).

Usage Guidelines

• Gargle 15 ml for 30 sec, 2x/day (after brushing).
• Do not swallow; spit out.
• Limit use to ≤14 days to avoid side effects.

Side Effects

• Tooth/tongue staining (reversible with cleaning).
• Taste alteration.
• Mucosal irritation, parotid swelling (rare).

Contraindications

• Hypersensitivity to chlorhexidine.
• Children <6 years (swallowing risk).

If sore throat persists >7 days, worsens, or has fever/difficulty swallowing, see a doctor—may need antibiotics or further workup.