Terbutaline Tablets: 5 Common Side Effects, Uses & Dosage
Relief from asthma and COPD symptoms: Terbutaline tablets widen airways to ease breathing difficulties effectively.
Terbutaline tablets, commonly known as
Bricanyl
, provide effective relief from chest tightness and wheezing associated with asthma and chronic obstructive pulmonary disease (COPD). As a short-acting beta-agonist bronchodilator, it relaxes airway muscles to improve airflow and alleviate symptoms like coughing and breathlessness.| Type of medicine | A short-acting beta-agonist bronchodilator |
|---|---|
| Used for | Asthma; COPD and other airways-related breathing problems |
| Also called | Bricanyl® |
| Available as | Tablets (typically 5 mg) |
About Terbutaline
**Terbutaline** belongs to the class of medicines known as bronchodilators, which work by widening the airways in the lungs. By relaxing the smooth muscles surrounding the air passages, it allows air to flow more freely, reducing symptoms such as wheezing, coughing, chest tightness, and shortness of breath. This makes it particularly useful for managing reversible airways obstruction in conditions like asthma, chronic bronchitis, emphysema, and other lung diseases affecting individuals aged 12 and older.
The medication is not a cure for underlying respiratory conditions but helps control symptoms on a regular schedule. It is distinct from rescue inhalers, which provide rapid relief for acute attacks. Terbutaline tablets are taken orally and are absorbed into the bloodstream to exert their effects systemically.
In clinical practice, terbutaline is prescribed when symptoms persist despite other treatments or as part of a stepwise management plan for asthma and COPD. Its short-acting nature means it provides relief for several hours per dose, typically 4-6 hours, necessitating regular dosing during waking hours.
When Not to Take Terbutaline
Terbutaline tablets should not be used in certain situations to avoid serious health risks. Do not take them if you are allergic to terbutaline sulfate or any ingredients in the tablets, such as lactose monohydrate, maize starch, povidone, microcrystalline cellulose, or magnesium stearate. Allergy signs include rash, itching, swelling, severe dizziness, or trouble breathing.
Additionally, avoid use without medical advice if you have severe heart disease, irregular heart rhythms, or angina, as terbutaline can exacerbate cardiovascular issues. It is also contraindicated for stopping premature labor outside a hospital setting.
Before Taking Terbutaline
Inform your doctor about your medical history before starting terbutaline. Key conditions to discuss include:
- Heart or blood vessel problems, or irregular heartbeat
- High blood pressure
- Overactive thyroid gland (hyperthyroidism)
- Diabetes, as it may require additional blood sugar monitoring
- Low potassium levels in the blood (hypokalemia)
- Seizure disorders
- History of pregnancy complications if pregnant
These conditions can influence how safely and effectively terbutaline works, potentially requiring dose adjustments or alternative therapies.
Disclosure of all current medications is crucial, including prescription drugs, over-the-counter products, vitamins, and herbal supplements. Terbutaline can interact harmfully with several classes:
- Beta-blockers (e.g., atenolol, propranolol, timolol eye drops), which oppose its effects
- Steroids (e.g., prednisolone)
- Xanthines (e.g., theophylline, aminophylline)
- Diuretics (e.g., furosemide), increasing risk of low potassium
Always check with your doctor or pharmacist for potential interactions.
How to Take Terbutaline
Follow your doctor’s instructions precisely, as printed on the pharmacy label and in the patient information leaflet (PIL). Tablets can be taken with or without food, and it’s best to take them at consistent times daily to maintain steady relief.
Dosage Guidelines:
| Group | Recommended Dose | Maximum Daily |
|---|---|---|
| Adults and teenagers (12+ years) | 5 mg three times daily | 15 mg (during waking hours) |
| Children | Dose determined by doctor (often lower) | As prescribed |
Treatment often starts with a lower dose, increased after a week if tolerated, to minimize side effects. Swallow tablets whole with water. Do not exceed the prescribed dose or use for sudden attacks—reserve rescue inhalers for that.
If symptoms return before the next dose, worsen, or terbutaline seems less effective, contact your doctor immediately. This may signal deteriorating control requiring a treatment review.
Understanding Your Medicines
Terbutaline tablets contain 5 mg of terbutaline sulfate as the active ingredient. Each tablet also includes excipients like lactose (important for lactose-intolerant individuals), which may cause issues in those with intolerance.
The PIL provides detailed composition and storage info: store below 25°C in a dry place, out of reach of children. Packs typically contain 100 tablets.
Possible Side Effects
Like all medications, terbutaline can cause side effects, though not everyone experiences them. Most are mild and improve with time as your body adjusts.
Common Side Effects (affecting up to 1 in 10 people):
- Trembling or shaking (tremor)
- Headache (often settles after first week; use painkillers if needed)
- Fast or pounding heartbeat (palpitations)
- Muscle cramps or tension
- Low potassium levels (symptoms: weakness, thirst, ‘pins and needles’)
Managing Common Issues:
| Side Effect | What to Do |
|---|---|
| Headache | Improves after 1 week; try pharmacist-recommended painkiller. See doctor if persists. |
| Feeling shaky | Usually settles; consult doctor if ongoing. |
| Muscle cramps, palpitations, low potassium | Speak to doctor for checks/advice. |
Serious Side Effects (rare, seek immediate help): Severe allergic reactions (anaphylaxis), chest pain, irregular heartbeat, worsening breathing, high blood sugar in diabetics.
Report any other unusual symptoms to your doctor or pharmacist.
How to Store Terbutaline
Keep tablets in their original packaging at room temperature (below 25°C), protected from moisture and light. Do not use after the expiry date. Dispose of unused medicine via pharmacy take-back programs, not household waste.
Frequently Asked Questions (FAQs)
Q: Can children take terbutaline tablets?
A: Yes, for ages 12+, but under strict doctor supervision with adjusted doses. Not typically first-line for young children.
Q: Is terbutaline safe during pregnancy?
A: Discuss with your doctor; not for preventing preterm labor casually. May need monitoring if diabetic or with pregnancy issues.
Q: What if I miss a dose?
A: Take it as soon as remembered unless near next dose. Do not double up. Resume schedule.
Q: Does terbutaline cure asthma?
A: No, it controls symptoms. Continue other treatments and follow your asthma action plan.
Q: Can I drink alcohol with terbutaline?
A: Moderate use likely fine, but consult doctor as it may worsen side effects like palpitations.
Important Safety Information
Terbutaline is most effective as part of comprehensive respiratory management. Regular check-ups ensure optimal dosing and monitor for tolerance or worsening disease. Never adjust doses self or stop abruptly without advice, as this risks rebound symptoms.
For emergencies, use your rescue inhaler and seek urgent care if ineffective. Patients with COPD or asthma should have a personalized action plan integrating terbutaline with lifestyle measures like avoiding triggers and quitting smoking.
References
- Terbutaline tablets (Bricanyl) — Patient.info. 2023. https://patient.info/medicine/terbutaline-tablets-bricanyl
- Bricanyl Tablets 5 mg terbutaline sulfate (PIL) — Medicines.org.uk (EMC). 2023-05-01. https://www.medicines.org.uk/emc/files/pil.59.pdf
- Bricanyl Tablets 5mg – Patient Information Leaflet — Medicines.org.uk (EMC). 2023. https://www.medicines.org.uk/emc/product/59/pil
- Terbutaline (oral route) — Mayo Clinic. 2024-01-01. https://www.mayoclinic.org/drugs-supplements/terbutaline-oral-route/description/drg-20073569
- Terbutaline (Brethine, Bricanyl) — WebMD. 2024. https://www.webmd.com/drugs/2/drug-12399/terbutaline-oral/details
- Terbutaline: MedlinePlus Drug Information — MedlinePlus (NIH). 2023-11-15. https://medlineplus.gov/druginfo/meds/a682144.html
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