Triprolidine is an antihistamine that reduces the effects of natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itching, watery eyes, and runny nose.

Triprolidine is used to treat sneezing, runny nose, watery eyes, hives, skin rash, itching, and other cold or allergy symptoms.

Triprolidine may also be used for purposes not listed in this medication guide.

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  • Histex PD Drops, Histex Syrup, Vanahist PD, Zymine
  • Stop using triprolidine and call your doctor at once if you have:

    painful or difficult urination.
    Common side effects may include:

    headache, dizziness, drowsiness;
    blurred vision;
    dry mouth, nose, or throat;
    nausea, vomiting, loss of appetite, constipation;
    increased urination; or
    feeling nervous or restless (especially in children).
  • Use exactly as directed on the label, or as prescribed by your doctor. Do not use in larger or smaller amounts or for longer than recommended. Cough or cold medicine is usually taken only for a short time until your symptoms clear up. Do not give this medicine to a child younger than 4 years old. Always ask a doctor before giving a cough or cold medicine to a child. Death can occur from the misuse of cough and cold medicines in very young children. Measure liquid medicine with the dosing syringe provided, or with a special dose-measuring spoon or medicine cup. If you do not have a dose-measuring device, ask your pharmacist for one. Do not take for longer than 7 days in a row. Call your doctor if your symptoms do not improve after 7 days of treatment, or if you have a fever with a headache, cough, or skin rash. If you need surgery, tell the surgeon ahead of time that you are using triprolidine. You may need to stop using the medicine for a short time.