About Levocetirizine
Medically reviewed by Dr Khizer Hussain Junaidy, MD Pharmacology, Diabetologist & Bariatric Physician, on 23 Oct 2026.
What it is for
An anti-allergy medicine for sneezing, runny nose, itchy eyes and itchy skin rash (urticaria).
How to take it
Take it once a day, usually at night.
Common side effects
- Sleepiness in some people.
- Dry mouth.
Call your doctor if
- Swelling of the face or lips, or breathing difficulty.
Take care
Avoid alcohol. Do not drive if it makes you sleepy. Lower dose in kidney disease.
From our clinic: Taking it at bedtime reduces daytime sleepiness.
About Montelukast
Medically reviewed by Dr Khizer Hussain Junaidy, MD Pharmacology, Diabetologist & Bariatric Physician, on 23 Oct 2026.
What it is for
Prevents asthma symptoms and reduces allergic sneezing and blocked nose. Often combined with levocetirizine.
How to take it
Take it once a day in the evening, with or without food. It is not for a sudden asthma attack.
Common side effects
- Headache, stomach upset.
- Rarely, changes in mood or sleep, vivid dreams.
Call your doctor if
- Low mood, anxiety, sleep walking or thoughts of self-harm, in adults or children.
- Asthma getting worse.
Take care
Keep using your reliever inhaler for sudden breathlessness.
From our clinic: Parents: tell the doctor about any change in your child's behaviour or sleep.
General information for patients, not a substitute for your doctor's advice. Your dose and plan may differ.