Chlorpheniramine 4mg Tablets 10s

What is Chlorpheniramine 4mg used for​​​?

Chlorpheniramine belongs to a group of medications known as antihistamines, which are used to relieve or prevent the symptoms of hay fever, itch, running nose and other types of allergy. It works by blocking the effects of a substance called histamine, which is produced in the body. Histamine can cause itching, sneezing, runny nose and watery eyes.

Sedating vs. non-sedating antihistamines

First-generation (sedating) antihistamines can cause more drowsiness and dry mouth. This includes Chlorpheniramine, Hydroxyzine, Ketotifen and Promethazine. These medicines may be used to improve your sleep should your sleep be disturbed by itching.

Non-sedating or second-generation antihistamines are newer medicines which generally cause less drowsiness. These include Cetirizine, Desloratadine, Fexofenadine, Levocetirizine, Loratadine and Rupatadine.

Depending on your symptoms, the doctor may prescribe you a sedating or non-sedating antihistamine.

Dosage and how to use​

• Follow the instructions on your medication label and use this medication as prescribed by your doctor. 
• It can be prescribed regularly or on an as-needed basis depending on the severity of your condition. 
• Each dose should be spaced at least 4-6 hours apart. Do not exceed 6 doses in a 24h period. 
• Chlorpheniramine may be taken with or without food.

What to do if I missed a dose?

If you forget to take a dose, take it as soon as you remember. Then take your next dose at the usual time. Do not take two doses to make up for the missed dose.

What are the possible side effects of Chlorpheniramine?

Chlorpheniramine is generally well tolerated. Some common but mild side effects include: 

• Drowsiness. Do not drive, operate any machinery or engage in activities that require you to concentrate. Discuss with your doctor regarding an alternative non-sedating antihistamine to be taken during the day.
• Dry mouth. Sip water regularly. Sucking on sugar-free sweets or ice chips may help alleviate symptoms.

What precautions should I take?

Inform your healthcare professional if:

• You are allergic to antihistamines 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 difficulty urinating or have a history of other bladder conditions.

What food or medicine must I avoid when I take Chlorpheniramine?

Alcohol may increase the sedative effect and should be avoided in general when taking Chlorpheniramine.

Handling and storage

• ​Keep your medicines in the original container or packaging, tightly closed or sealed in a cool and dry place, away from direct sunlight.
• Keep the medicine out of reach of children.
• Throw away all expired medicines.

The above information answers some common questions about this medicine. It does not contain all the available information. It also does not take the place of talking to your doctor or pharmacist.

References

https://www.healthhub.sg/a-z/medications/385/Antihistamine-oral

https://www.singhealth.com.sg/SCH/patients-visitors/medicine/antihistamines