Answer
Chlorphenamine in Piriton Allergy Tablets may cause drowsiness, dizziness, blurred vision and psychomotor impairment through its anticholinergic properties, which can seriously impair the ability to drive and operate machinery.
Sources for this answer
- Piriton Allergy TabletsHaleon UK Trading Limited · emc · SmPC §4.7 Effects on ability to drive and use machines · Version 10Document updated
Sources checked