Cetirizine

What is Cetirizine for?

Cetirizine belongs to a group of medicines known as antihistamines. It can be used for the relief of: 
•    Runny nose (due to a cold, flu or allergies) 
•    Itch in the eyes, nose or skin (due to an insect bite or allergies) 
•    Redness and swelling of skin and eyes

You can also find out about this medication by watching these videos: They are available in English, 中文, Melayu and தமிழ்: Antihistamines(oral)
 

How should I take or use Cetirizine?

•    Take the medication when necessary to relieve your symptoms 
•    Do not exceed the maximum dose as recommended by your healthcare professional 
•    You may take this medication with or without food. However, food may slow down the absorption leading to a slower time to take effect.
 

What should I do if I forget to take or use Cetirizine?

• If the medication is to be taken only on a “as-needed” basis; there is no need to take the medication if you are not experiencing any symptoms.  
• If it is prescribed to be taken regularly for certain conditions (e.g., chronic itching). It is important to follow the instructions stated on the medicine label given to you.
• If you miss a dose, take it as soon as you remember. However, if it is almost time for your next dose, skip the missed dose and continue normally. Do not take two doses or extra medication to make up for the missed dose.
   

What precautions should I take when taking or using Cetirizine?

Inform your healthcare professional if: 

• You are allergic to this medication or any of the other ingredients of this medication
• You are pregnant, planning to become pregnant, or breastfeeding
• You are taking any other medications, including supplements, traditional medications and herbal remedies
• You have or have ever had:
  • Liver or kidney problems 
  • Seizures
  • Enlarged prostate gland
  • Difficulty urinating or have a history of other bladder conditions
     

What food or medication should I avoid when I take or use Cetirizine?

•    Taking this medication with alcohol may worsen the drowsy side effect. Avoid alcohol while on this medication.
•    Many over-the-counter medications contain antihistamines, always check with your healthcare professional before taking two over-the-counter medications at the same time to prevent overdosing.
 

What are some common side effects of Cetirizine?

• Affect alertness (drowsiness and tiredness)  
  • Avoid driving, operating machinery or other activities which require concentration while on this medication
  • Note: Cetirizine is a newer antihistamine that is less likely to cause drowsiness
• Headache
• Dry mouth, skin and eyes
  • Drink more water or suck an ice cube to help with mouth dryness.
  • Use lubricant eye drops to resolve eye dryness
• Difficulty in passing urine
  • Stop taking this medication and consult your healthcare professional for other alternatives
• Discontinuing cetirizine after long-term use may result in rare but serious skin itchiness
  • Please consult your healthcare professional for advice
     

What are some rare but serious side effects that I need to seek medical advice immediately?

The symptoms of a drug allergy include one or more of the following:
•    Swollen face/eyes/lips/tongue
•    Difficulty in breathing
•    Itchy skin rashes over your whole body

You can also find out about drug allergies by watching these videos: They are available in English, 中文, Melayu and தமிழ்: Drug Allergies

Rarely this medication may cause: 
•    False beliefs (Delusions)
•    A group of symptoms where a person loses touch with reality, affecting their thoughts, feelings and behaviour (Psychosis) 

If you experience any of these symptoms, you should stop your medication and see your healthcare professional immediately.

If you continue to experience symptoms for more than 2 weeks even with self-treatment or have any of the following symptoms:
•    Blood in your phlegm or mucus
•    Unexplained weight loss, constant fatigue, night sweats

Your condition may be too serious for self-treatment and you should consult a healthcare professional.
 

How should I store Cetirizine?

Store in a cool and dry place, away from direct sunlight. Keep this medication away from children.

How do I throw away Cetirizine safely?

Pack this medication into a black trash bag and seal it tightly before throwing into the rubbish chute or bin.