Duolin Respules

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Overview

Duolin Respules is a prescription-only nebulizer solution containing a combination of Ipratropium Bromide, an anticholinergic bronchodilator, and Levosalbutamol, a short-acting beta-2 agonist bronchodilator. It is used for the relief of bronchospasm (narrowing of the airways) in conditions such as asthma and chronic obstructive pulmonary disease (COPD), particularly during acute exacerbations where rapid and effective opening of the airways is needed. This medicine is supplied as single-dose respules intended strictly for use with a nebulizer machine, not for oral or injectable use.

Because Duolin Respules combines two bronchodilators and is used to manage a potentially serious respiratory condition, it requires a doctor’s prescription or an online consultation with a doctor through DoctorOnCall before it can be dispensed. A doctor needs to confirm the diagnosis, assess the severity of the respiratory condition, and determine the appropriate nebulized dose and frequency, since inappropriate use of bronchodilators can mask worsening disease or cause cardiovascular side effects.

How it Works

Ipratropium Bromide blocks acetylcholine receptors in the airway smooth muscle, reducing the reflex bronchoconstriction (tightening) that occurs in asthma and COPD, which helps widen the airways. Levosalbutamol is a beta-2 adrenergic agonist that relaxes the smooth muscle of the bronchi directly, producing rapid bronchodilation. When combined and administered via a nebulizer, these two mechanisms work together to more effectively relax and widen narrowed airways, improving airflow and easing breathing difficulty during an asthma or COPD flare-up.

Directions for Use

Duolin Respules must only be used exactly as prescribed by a doctor following an online consultation through DoctorOnCall or an in-person assessment, and must be administered using a properly functioning nebulizer device — it is not to be swallowed or injected. Open one respule as directed, empty its full contents into the nebulizer chamber (diluting with saline if instructed by the doctor), and inhale the resulting mist through the mouthpiece or mask over the prescribed period. Do not reuse a partially used respule, and follow the doctor’s instructions on frequency and technique carefully.

Dosage

The dose and frequency of Duolin Respules must be determined by a doctor based on the severity of the respiratory condition, following a prescription issued after an online consultation via DoctorOnCall or an in-person medical assessment. Patients should not increase the frequency of nebulization beyond what is prescribed, even if symptoms feel severe, and should seek urgent medical attention if breathing difficulty is not relieved or worsens despite treatment.

Shelf Life

Duolin Respules should be used within the shelf-life period printed on the foil strip or carton, and discarded after the stated expiry date. Each respule is intended for single use only; any unused solution remaining in an opened respule should be discarded and not stored for later use.

Storage Instructions

Store Duolin Respules as directed on the packaging, typically at room temperature and protected from light, unless the label specifically instructs refrigeration. Keep respules in their original foil strip until ready for use to protect them from light and moisture, and keep out of the reach and sight of children.

Side Effects

  • Shakiness or tremors
  • Headache
  • Increased heart rate
  • Nervousness or restlessness
  • Muscle cramps
  • Dry mouth or throat irritation

Contraindications

  • Known hypersensitivity to ipratropium bromide, levosalbutamol (or salbutamol/atropine-related compounds), or any other ingredient in this product
  • Hypertrophic obstructive cardiomyopathy
  • Tachyarrhythmia (abnormally fast, irregular heart rhythm)
  • Not to be used without a doctor’s prescription and ongoing medical supervision
  • Use with caution in patients with known cardiovascular disease, uncontrolled hyperthyroidism, or diabetes

Drug / Food Interactions

  • Should not generally be combined with other beta-blocker medicines, as they may reduce the bronchodilator effect of Levosalbutamol
  • Concurrent use with other sympathomimetic bronchodilators may increase the risk of cardiovascular side effects
  • Caution with monoamine oxidase inhibitors (MAOIs) or tricyclic antidepressants, which may increase cardiovascular effects
  • Diuretics used together with this medicine may increase the risk of low blood potassium (hypokalaemia)
  • Inform the prescribing doctor of all other respiratory or heart medicines being used before starting treatment

Quick Tips

  • Always obtain and use this medicine strictly under a doctor’s prescription and guidance via DoctorOnCall — never adjust the dose or frequency on your own
  • Use only with a properly functioning nebulizer device as instructed by your doctor or pharmacist
  • Seek urgent medical attention if breathing difficulty worsens or is not relieved after nebulization
  • Report tremor, palpitations, or chest discomfort to the prescribing doctor promptly
  • Attend scheduled doctor follow-up visits to monitor asthma/COPD control and adjust treatment as needed

Frequently Asked Questions

What is Duolin Respules used for?

It is a prescription combination bronchodilator nebulizer solution used to relieve bronchospasm and breathing difficulty in asthma and COPD, particularly during acute flare-ups, and must be used with a nebulizer machine.

Do I need a prescription to use Duolin Respules?

Yes, Duolin Respules is a prescription-only combination bronchodilator and requires a valid doctor’s prescription or an online consultation through DoctorOnCall before it can be dispensed.

How is Duolin Respules administered?

It is administered only through a nebulizer machine, where the contents of one respule are emptied into the nebulizer chamber and inhaled as a mist through a mouthpiece or mask; it is never swallowed or injected.

What side effects can occur with Duolin Respules?

Common side effects include tremor, headache, rapid heartbeat, and dry mouth; rarely, it can cause a paradoxical worsening of breathing difficulty, which requires stopping treatment and seeking urgent medical attention.

Who should not use Duolin Respules?

It should not be used by anyone with a known allergy to its ingredients, hypertrophic obstructive cardiomyopathy, or certain fast/irregular heart rhythms, and should never be used without a doctor’s prescription and supervision.

Can I purchase Duolin Respules through DoctorOnCall in Malaysia or Singapore?

Yes, but as this is a prescription medicine, you will need to complete an online consultation through DoctorOnCall so a doctor can assess your condition and issue a prescription before your order in Malaysia or Singapore can be processed.

Is Duolin Respules supplied by DoctorOnCall genuine and safe to use for customers in Malaysia and Singapore?

Yes, all stock supplied by DoctorOnCall is sourced through licensed pharmacy supply channels and is checked by a registered pharmacist before dispensing to customers in Malaysia and Singapore.

What payment methods can I use to pay for Duolin Respules in Malaysia and Singapore?

You can pay using Online Banking, Credit Card, and e-Wallets (Boost, GrabPay), among other available payment options at checkout.

Does DoctorOnCall offer an installment payment plan for Duolin Respules in Malaysia?

Instalment payment options may be available for eligible purchases; please contact DoctorOnCall’s Customer Service for the latest information on installment plans.

Is delivery free, and how much does it cost for Duolin Respules orders to Malaysia and Singapore?

Delivery fees depend on your delivery location and order terms; please contact Customer Service for the most current shipping fee information.

How long will it take for my Duolin Respules order to arrive in Malaysia or Singapore?

Once your prescription is approved, orders typically take 3-5 working days to arrive in Malaysia and 5-9 working days to arrive in Singapore, depending on location and courier schedules.

What is DoctorOnCall’s shipping, return, or cancellation policy for Duolin Respules in Malaysia and Singapore?

Please refer to DoctorOnCall’s Shipping & Delivery Policy and Return, Refund & Exchange Policy, or contact Customer Service directly for details relevant to your order in Malaysia or Singapore.

Ingredients / Active Ingredients

  • Ipratropium Bromide
  • Levosalbutamol
  • Other non-active excipients as listed on the product packaging

Safety Advice

Pregnancy

Safe If Prescribed

This medicine should only be used during pregnancy if prescribed by a doctor after careful evaluation.

Breastfeeding

Generally Safe

This medicine is generally safe during breastfeeding with minimal risk to the infant.

Kidney

Generally Safe

Generally safe, but caution may be required in some patients.

Liver

Generally Safe

Generally safe, but caution may be required in some patients.

Alcohol

Use With Care

Caution is advised when consuming alcohol with this medicine.

Driving

Use With Care

Use caution while driving until you know how this medicine affects you.

Relevant Information

Duolin Respules is intended for use with a nebulizer machine only and is typically prescribed for patients experiencing moderate to severe bronchospasm associated with asthma or COPD exacerbations. Ongoing doctor follow-up and monitoring are important parts of treatment with this medicine, as the underlying respiratory condition often requires a broader treatment plan beyond nebulized bronchodilators alone, including long-term controller medicines where appropriate.

Medical Review

Written by:

Dr. Chong Zhan Pong

Doctor of Medicine (MD), International Medical University (IMU)

Reviewed by:

Dr. Mohd Izzat Amir Bin Awang

Doctor of Medicine (MD), University of Mansoura - Manchester

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Important Medical Information

💊 Recommended Dosage:

The dose and frequency of Duolin Respules must be determined by a doctor based on the severity of the respiratory condition, following a prescription issued after an online consultation via DoctorOnCall or an in-person medical assessment. Patients should not increase the frequency of nebulization beyond what is prescribed, even if symptoms feel severe, and should seek urgent medical attention if breathing difficulty is not relieved or worsens despite treatment.

🛑 Contraindications (Do not use if):
  • Known hypersensitivity to ipratropium bromide, levosalbutamol (or salbutamol/atropine-related compounds), or any other ingredient in this product
  • Hypertrophic obstructive cardiomyopathy
  • Tachyarrhythmia (abnormally fast, irregular heart rhythm)
  • Not to be used without a doctor’s prescription and ongoing medical supervision
  • Use with caution in patients with known cardiovascular disease, uncontrolled hyperthyroidism, or diabetes
If you are unsure, please chat with us or consult your doctor.
⚠️ Common Side Effects:
  • Shakiness or tremors
  • Headache
  • Increased heart rate
  • Nervousness or restlessness
  • Muscle cramps
  • Dry mouth or throat irritation
Stop taking this medication immediately and consult your doctor if you experience severe allergic reactions or side effects.
IMPORTANT: Unsure? Chat with our pharmacists (Mon - Sat, 9:00am - 6:00pm) before buying.