Answer
Only if they meet the age stated for the exact product and can safely suck a lozenge. Selected Strawberry and Honey and Lemon products are unsuitable under 6 years; the selected Menthol product is unsuitable under 12 years.
Sources for this answer
- Strepsils Strawberry Sugar Free Lozengesemc · SmPC Current selected SmPC · Version 6
- Strepsils Honey and Lemon