Levocetirizine is considered a non-sedating antihistamine. However, it may still cause drowsiness to some so it is usually advised to be taken at night. The drowsiness often occurs during the first few hours after taking the drug so taking it at bedtime could also help you sleep easier.
Can this be taken at anytime of the day?
This medication works best if used at regular intervals. It can be safely used daily. However, do not use this more often than directed by your doctor. After using this daily for allergies for at least 6 months, consult with your doctor before using it for a longer time.