Yes, it's important to be aware that drowsiness can indeed be a common side effect associated with the use of Piriton Antihistamine Allergy Relief Syrup. The active ingredient, chlorphenamine maleate, has a propensity to induce drowsiness in some individuals, particularly when taken in higher doses. Parents and caregivers should exercise caution, especially when their child is partaking in activities that necessitate heightened alertness, such as operating machinery or engaging in activities requiring focused attention.