Promethazine 5 mg / 5 ml (Brand Name: Phenergan) Age: 2 to 5 years for allergies Age: 2 to 5 years for motion sickness Age: 5 to 10 years for allergies Age: 5 to 10 years for motion sickness Age: >10 years and adults for allergies Age: >10 years and adults for motion sickness