Histalex 100ml syrup contains chlorpheniramine maleateas the active ingredient.It is an antihistamine used to relieve symptoms associated with allergies and the common cold.  

Common uses include:

• Urticaria (hives)  
• Allergic reactions  
• Angioneurotic edema (swelling under the skin)  
• Vasomotor rhinitis (stuffy or runny nose not caused by infection)  
• Cough  
• Common cold symptoms (runny nose, sneezing)
• Motion sickness  
• Other allergic conditions like hay fever and allergic dermatitis  

Dosage:

The usual dosage for Histalex syrup (2mg/5ml strength) is:

• Adults: 4 mg (10 ml) every 4-6 hours, with a maximum daily dose of 24 mg (60 ml).
• Children:
  • 6-12 years: 2 mg (5 ml) every 4-6 hours, maximum 12 mg (30 ml) daily.
  • 2-5 years: 1 mg (2.5 ml) every 4-6 hours, maximum 6 mg (15 ml) daily.
  • 1-2 years: 1 mg (2.5 ml) twice daily.
  • Below 1 year: Not recommended.

Side effects:

Common side effects of Histalex can include:

• Drowsiness  
• Dizziness  
• Weakness  
• Gastrointestinal upset (nausea, vomiting)  
• Dry mouth  

Less common but potentially serious side effects can include:

• Blurred vision or double vision  
• Increased heart rate
• Difficulty urinating  
• Confusion
• Hallucinations
• Seizures  

Precautions:

• Histalex can cause drowsiness and impair alertness, so avoid driving or operating machinery after taking it.  
• Avoid alcohol consumption while taking Histalex as it can enhance drowsiness.  
• Use with caution in elderly patients and individuals with glaucoma, prostatic hypertrophy, epilepsy, or liver disease.
• Inform your doctor if you are pregnant or breastfeeding before using this medication, especially during the first trimester of pregnancy and lactation.  
• Histalex may interact with other medications, including sedatives, hypnotics, opioid analgesics, and certain antidepressants (MAOIs). Inform your doctor about all the medications you are currently taking.

This information is for general knowledge and informational purposes only, and does not constitute medical advice. Always consult with a qualified healthcare professionalfor any health concerns or before making any decisions related to your health or treatment. They can assess your specific situation and provide appropriate guidance