Answer
Eligibility is product-specific. It must not be given to children under 6, and some selected formulations are restricted to people aged 12 or over; always check the individual label.
Sources for this answer
- NHSNHS · NHS medicine guidance
- Boots Decongestant Tablets — Current selected SmPCemc · Summary of Product Characteristics
- Sudafed Decongestant Liquid — Current selected SmPC