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Last updated on November 22nd, 2021

Generic name: Terbutaline

Brand names: Brethaire

Brethaire Information:

Brethaire is used to treat wheezing and shortness of breath from lung problems (e.g., chronic obstructive pulmonary disease, emphysema, asthma, bronchitis). Brethaire is a bronchodilator (beta-2 receptor agonist) that works by opening breathing passages to make breathing easier.

Your doctor may prescribe this remedy for other purposes. Contact your physician if you need to learn more information about this drug.

Don’t stop treatment with Brethaire earlier than it was prescribed by your doctor even if you notice improvements of your condition. Stopping the medication too early may worsen your condition. Be careful about doing dangerous tasks, driving, operating machinery or climbing until you are aware how this drug affects you. Don’t drink alcohol. Always contact a medic before giving Brethaire to a child.

What symptoms or conditions should I report to a doctor before I take this medicine?

It is important to report to a doctor if you have or had the following conditions:

  • high blood pressure
  • history of seizures
  • heart disease
  • adrenal gland tumor
  • pregnancy, breast-feeding, planning to become pregnant
  • an unusual or allergic reaction to Brethaire other preservatives, medicines, dyes or foods
  • taking any dietary supplement, prescription or nonprescription medicine, herbal preparation
  • an irregular heartbeat
  • diabetes
  • overactive thyroid

How to use Brethaire:

Note: This remedy was prescribed to you only. Do not share this medicament with others. Follow strictly your doctor’s prescription. Do not take more or longer than your doctor recommended.

Brethaire should be taken orally with some water. This medicament should be taken on an emply stomach, at least 1 hour before meal. Take the doses on the rigid schedule.

The tablets should be swallowed whole. Do not break, chew or crush them.

The dosage may vary among individuals. It is obviously to contact your doctor before taking this medicament. Follow your physician’s instructions carefully.

What should be done if I missed the dose?

In case you forgot to take the dose, take it at your earliest opportunity. Never double your dose if it is almost time for your next dose. Take only one dose at once.


Taking any medicine in large doses you can have serious consequences for your health. If you feel an overdose, contact your health care professional instantly.



  •     Catechol-O-methyltransferase (COMT) inhibitors (eg, entacapone), tricyclic antidepressants (eg, amitriptyline), droxidopa, monoamine oxidase (MAO) inhibitors (eg, phenelzine) because the risk of side effects, such as life-threatening irregular heartbeat, may be increased
  •     Beta-blockers (eg, propranolol) since they may lower the effectiveness of this drug
  •     Diuretics (eg, furosemide) since this medicine may increase the risk of their side effects
  •     Insulin

This list of interactions may be not complete. Provide your medical practitioners entire list of medicines, herbs, dietary supplements or non-prescription drugs you take. Moreover tell them whether you drink alcohol, use illegal drugs or smoke. Particular items may interact with your drug.

Side Effects:

Serious side effects that you should inform your physician immediately:

  • chest pain
  • sore throat and fever
  • swelling of the feet or hands
  • allergic reactions like swelling of the lips, face or tongue,  skin rash, itching, difficulty breathing or hives
  • unusual bleeding
  • difficulty breathing
  • unusual weight gain
  • irregular, slow heartbeat

Side effects which usually don’t require medical control

(inform your physician if they persist or are bothersome):

  • vomiting, diarrhea,  upset stomach, constipation
  • lightheadedness or dizziness
  • rash
  • excessive tiredness
  • cold hands and feet

This list of side effects may be not complete, others may occur. Inform your medical practitioners about all side effects you experience.

Important Information:

Check your blood pressure regularly. Don’t stand up quickly, especially if you are an older patient. FDA pregnancy category C. It is not known whether Brethaire is harmful to an unborn baby. Before taking this medication, tell your doctor if you are pregnant or plan to become pregnant during treatment. Brethaire can pass into breast milk and may harm a nursing baby. Do not use Brethaire without telling your doctor if you are breast-feeding a baby. Do not stop taking Brethaire without first talking to your doctor. Stopping suddenly may make your condition worse.


Brethaire should be stored at room temperature, between 15 and 30 degrees C (59 and 86 degrees F), in a tightly closed container. Protect from moisture, direct heat, and light. Do not store in the bathroom or near a sink. Keep Brethaire out of the reach of children and away from animals.

Warning: Before taking the drug you need to consult your doctor. The information contained in this article is not intended to cover all possible precautions, drug interactions, adverse effects, directions, uses, allergic reactions or warnings.

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