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Dimetane (Generic Brompheniramine)

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Why is this medication prescribed?

Dimetane, also known as brompheniramine, is an antihistamine medication primarily prescribed to relieve symptoms of allergies, such as sneezing, itching, watery eyes, and runny nose. It works by blocking the effects of histamine, a substance in the body that causes allergic symptoms.

How should this medicine be used?

Dimetane, or brompheniramine, is typically taken orally as directed by a healthcare provider. Here’s a general guideline on how Dimetane should be used:

  • Dosage: Follow the dosage instructions provided by your doctor or pharmacist carefully. The appropriate dosage may vary depending on factors such as age, weight, medical condition, and response to treatment.
  • Administration: Dimetane can be taken with or without food. Swallow the tablets whole with a full glass of water unless otherwise directed by your healthcare provider.
  • Timing: Take Dimetane as prescribed, usually two to three times a day. Do not exceed the recommended dosage or frequency of administration unless instructed by your doctor.
  • Avoiding Certain Substances: Avoid consuming alcohol or using other medications that can cause drowsiness while taking Dimetane, as it may intensify this effect.
  • Duration of Use: Use Dimetane for the duration recommended by your doctor, even if your symptoms improve before the medication is finished. Stopping the medication prematurely may allow symptoms to return.
  • Special Instructions: If you miss a dose of Dimetane, take it as soon as you remember. However, if it is almost time for your next dose, skip the missed dose and continue with your regular dosing schedule. Do not double the dose to catch up.
  • Consultation: If you have any questions or concerns about how to use Dimetane, consult your healthcare provider or pharmacist for clarification.

Remember, this is a general guideline, and it’s essential to follow the specific instructions provided by your healthcare provider. They will tailor the dosage and usage instructions based on your individual needs and medical condition.

Other uses for this medicine

Dimetane (brompheniramine) is primarily used to treat symptoms of allergies, such as sneezing, itching, watery eyes, and runny nose. However, it may also have other uses or be included in combination medications for treating conditions such as the common cold, hay fever, or allergic reactions to insect bites or stings. It’s essential to use Dimetane only for the purposes prescribed by your healthcare provider.

What special precautions should I follow?

Here are some special precautions to consider when using Dimetane:

  • Medical History: Before using Dimetane, inform your doctor about your medical history, especially if you have a history of certain conditions such as asthma, glaucoma, high blood pressure, heart disease, thyroid problems, urinary problems, or an enlarged prostate gland.
  • Allergies: Inform your doctor if you have any allergies to brompheniramine or other antihistamines, or if you have allergies to any other substances, including foods, preservatives, or dyes.
  • Pregnancy and Breastfeeding: If you are pregnant or breastfeeding, consult your doctor before using Dimetane. It’s important to weigh the potential risks and benefits of using this medication during pregnancy or while breastfeeding.
  • Interactions: Inform your doctor about all the medications, vitamins, and herbal supplements you are currently taking, as Dimetane may interact with certain medications, including monoamine oxidase inhibitors (MAOIs), sedatives, tranquilizers, antidepressants, and other antihistamines.
  • Drowsiness: Dimetane may cause drowsiness or dizziness. Avoid driving, operating machinery, or engaging in activities that require mental alertness until you know how this medication affects you. Avoid alcohol and other medications that may increase drowsiness while taking Dimetane.
  • Side Effects: Be aware of potential side effects of Dimetane, including dizziness, drowsiness, dry mouth, blurred vision, constipation, or difficulty urinating. If you experience any severe or persistent side effects, contact your doctor.
  • Overdose: Do not exceed the recommended dosage of Dimetane, as overdose can lead to serious complications. If you suspect an overdose or experience symptoms such as extreme drowsiness, confusion, hallucinations, seizures, or difficulty breathing, seek immediate medical attention.

Always follow your doctor’s instructions and ask any questions you may have about using Dimetane safely and effectively.

What special dietary instructions should I follow?

Regarding dietary instructions, there are typically no specific dietary restrictions associated with Dimetane. However, it’s essential to maintain a balanced diet and stay hydrated while taking any medication.

What should I do if I forget a dose?

If you forget to take a dose of Dimetane:

  • Take it when you remember: If it’s not too close to your next scheduled dose, take the missed dose as soon as you remember.
  • Skip if close to next dose: If it’s almost time for your next dose, skip the missed dose and resume your regular dosing schedule. Do not double the dose to catch up.
  • Consult your doctor: If you’re unsure about what to do, or if you miss multiple doses, consult your healthcare provider for guidance.

What side effects can this medication cause?

Dimetane (brompheniramine), like any medication, may cause side effects in some individuals. Common side effects of Dimetane include:

  • Drowsiness or sedation
  • Dizziness
  • Dry mouth, nose, or throat
  • Blurred vision
  • Constipation
  • Nausea or upset stomach
  • Headache
  • Difficulty urinating

These side effects are usually mild and may diminish as your body adjusts to the medication. However, if any of these side effects persist or worsen, it’s essential to inform your healthcare provider.

In some cases, Dimetane may also cause more severe side effects that require immediate medical attention. These less common but serious side effects may include:

  • Allergic reactions such as rash, itching, swelling of the face, tongue, or throat, severe dizziness, or trouble breathing.
  • Mental/mood changes such as confusion, hallucinations.
  • Fast/irregular heartbeat
  • Difficulty urinating
  • Seizures

If you experience any of these serious side effects, seek medical attention promptly.

Additionally, Dimetane may have other side effects not listed here. If you notice any other effects not listed above, contact your doctor or pharmacist.

It’s important to remember that your healthcare provider has prescribed Dimetane because they have judged that the benefits outweigh the risk of side effects. However, if you have any concerns about side effects or experience any unusual symptoms while taking Dimetane, don’t hesitate to discuss them with your healthcare provider.

What should I know about storage and disposal of this medication?

Here’s what you should know about the storage and disposal information regarding Dimetane:


  • Store Dimetane at room temperature away from light and moisture.
  • Keep the medication out of reach of children and pets.
  • Do not store Dimetane in the bathroom or near the kitchen sink, where it could be exposed to moisture or humidity.
  • Follow any specific storage instructions provided by your pharmacist or included with the medication.


  • Dispose of expired or unused Dimetane properly according to local regulations or guidelines.
  • Do not flush medications down the toilet or pour them down the drain unless instructed to do so.
  • Consult your pharmacist or local waste disposal facility for information on how to safely dispose of medications.

In case of emergency/overdose

  • If you suspect an overdose of Dimetane, seek emergency medical attention or contact a poison control center immediately.
  • Symptoms of overdose may include extreme drowsiness, confusion, hallucinations, seizures, or difficulty breathing.
  • Do not attempt to treat an overdose without professional medical assistance.

What other information should I know?

  • Keep all appointments with your healthcare provider while taking Dimetane to monitor your progress and response to the medication.
  • Inform any healthcare provider who treats you about all the medications, vitamins, and herbal supplements you are taking, including Dimetane.
  • Avoid activities requiring mental alertness, such as driving or operating machinery, until you know how Dimetane affects you.
  • Consult your healthcare provider if your symptoms do not improve or worsen while taking Dimetane.
  • Do not share Dimetane with others, even if they have similar symptoms, as it may not be suitable for their condition.

By following these guidelines for storage, disposal, emergency procedures, and other important information, you can use Dimetane safely and effectively. If you have any questions or concerns about Dimetane or its use, don’t hesitate to consult your healthcare provider or pharmacist for guidance.

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