Serevent (Salmeterol)

Type

Product

Manufacturer

Country

Dosage

Qty-Price (USD)

Type:

Product: Serevent Inhaler

Manufacturer: GSK

Country: United Kingdom

Dosage: 25 mcg/120 dose

Qty-Price (USD):

Type:

Product: Serevent Diskus

Manufacturer: GSK

Country: Canada

Dosage: 50 mcg/60 dose

Qty-Price (USD):

Type:

Product: Serevent Diskus

Manufacturer: GSK

Country: New Zealand

Dosage: 50 mcg/60 dose

Qty-Price (USD):

Generic Equivalent of Serevent

Type

Product

Manufacturer

Country

Dosage

Qty-Price (USD)

There is no generic product of Serevent.

Serevent Information

medically reviewed by Dr. HaVy Ngo, Pharmacist on June 4, 2025.

Serevent at CanadaPharmacyOnline.com

Brand Serevent (salmeterol xinafoate), manufactured by GlaxoSmithKline, is available in many countries, including Canada, New Zealand, and the United Kingdom.

The generic version of Serevant is currently unavailable.

Dosage:

At this pharmacy, brand Serevent is available in inhalation aerosol form, available at 25 mcg/120 dose. Serevent is also available in diskus form, available at 50 mcg/60 dose.

Your doctor will determine the appropriate dose based on your needs and medical conditions.

Usage:

Serevent (salmeterol xinafoate) is a prescription medication to prevent asthma symptoms such as wheezing, shortness of breath, and exercise-induced asthma. It is a long-acting beta2-adrenergic receptor agonist (LABA). Serevent should be used regularly to help control asthma and not to relieve sudden asthma symptoms.

For more information, check the link to the product labeling information, https://www.accessdata.fda.gov/drugsatfda_docs/label/2004/20236s030,20692s026lbl.pdf.

Mechanism of Action:
Serevent (salmeterol xinafoate) is a long-acting beta2-adrenergic receptor agonist (LABA). Salmeterol works by relaxing the smooth muscles in the airways, which helps to open the airways and make breathing easier. This bronchodilation effect helps to prevent asthma symptoms. The action of salmeterol lasts for about 12 hours.

Use Serevent exactly as your doctor prescribes. Do not change your dosage or stop using the medication without consulting your doctor. Follow the instructions on the official Serevent product monograph | GSK: https://ca.gsk.com/media/6214/serevent.pdf. Consult your doctor for personalized guidance and safe use.

The information below summarizes some, but not all, potential side effects, risks, and interactions. Before using Serevent, it is essential to discuss all possible aspects with your doctor or pharmacist.

Side Effects:

The information below is a partial list of side effects; individual reactions can vary. Before starting Serevent, it is crucial to discuss potential side effects and risks with your doctor or pharmacist.

Common side effects: These are examples of some common side effects of Serevent, but others are possible. Contact your doctor promptly if any side effects are persistent, worsening, or concerning, or if you experience any other concerning symptoms.
• Cough;
• Dizziness;
• Headache;
• Muscle cramps;
• Nausea;
• Nervousness or anxiety;
• Shakiness (tremor);
• Sore throat.

Serious or rare side effects: Stop using Serevent and seek immediate medical attention if you experience any of the following:
• Allergic reactions, including rash, itching, swelling, hives, and difficulty breathing;
• Chest pain or discomfort;
• Fast or irregular heartbeat (palpitations);
• Increased difficulty breathing or wheezing after using the inhaler (paradoxical bronchospasm);
• Signs of high blood sugar (hyperglycemia), including increased urination, excessive thirst, blurred vision, or increased hunger;
• Signs of low potassium levels (hypokalemia) include muscle cramps, weakness, irregular heartbeat, constipation, or fatigue.

Contraindications:

This is not an exhaustive list of contraindications. It is crucial to discuss all your medical conditions, past and present, and all medications you are taking with your doctor or pharmacist before starting Serevent.

Serevent should not be used if:
• You are allergic to salmeterol xinafoate or any of the ingredients in Serevent.
• Serevent should not be used to treat sudden asthma symptoms. You should use your short-acting inhaler (rescue inhaler) for this purpose.

Tell your doctor about all of your medical conditions, past and present, before starting Serevent. This is crucial because certain conditions can affect whether Serevent is right for you. These conditions may include, but are not limited to:
• Cardiovascular disorders, including coronary insufficiency, cardiac arrhythmias, and high blood pressure;
• Hyperthyroidism (overactive thyroid gland);
• Hypokalemia (low potassium);
• Seizures (epilepsy).

Drug Interactions:

Before using Serevent, it is essential to discuss all potential risks and interactions with your doctor or pharmacist. For complete and up-to-date information, refer to the Details for Serevent - Drug and Health Product Register.

Provide your doctor with a complete list of all your medications, including prescriptions, over-the-counter (OTC) drugs, vitamins, and herbal supplements. Serevent may interact with other medicines, including but not limited to other long-acting beta-agonists (LABAs), beta-blockers, diuretics, corticosteroids, and certain antidepressants.

Asthma-Related Death
Long-acting beta2-adrenergic agonists (LABAs), such as salmeterol, have been associated with a potential increased risk of asthma-related death, as highlighted by regulatory agencies. For this reason, Serevent should only be used if your asthma is not well-controlled on other asthma controller medications (such as inhaled corticosteroids) or if the severity of your disease warrants initiation of combination therapy with a LABA. Once asthma is controlled, assess at regular intervals and step down therapy if possible without loss of asthma control. Tell your doctor immediately if your asthma symptoms worsen or if your rescue inhaler is not working.

Pregnancy and Breastfeeding:

Serevent should only be used during pregnancy or breastfeeding if the potential benefits outweigh the risks and under strict medical supervision. Salmeterol may pass into breast milk. Women who are pregnant, planning to become pregnant, or breastfeeding must discuss the risks and benefits with their doctor.

Use in Children:

Serevent's safety and effectiveness have been established in pediatric patients 4 years and older. The dosage may need to be adjusted based on the child's age and weight. Talk to your doctor or pharmacist for specific guidance on using this medication in children.

Frequently Asked Questions about Serevent at CanadaPharmacyOnline.com:

Why is Serevent more affordable in Canada than in the United States?

Prescription drug prices, including Serevent, are generally lower in Canada than in the US due to a combination of factors, primarily government price regulations, differing market dynamics, and other economic considerations. In Canada, provincial and federal governments negotiate drug prices with pharmaceutical companies, which often results in lower costs compared to the US, where market forces play a more significant role. For more information, see the FAQs on Prescription Drug Importation from the Kaiser Family Foundation (KFF): https://www.kff.org/health-costs/issue-brief/faqs-on-prescription-drug-importation/

Can I buy over the counter from you?

No, Serevent requires a valid prescription from your doctor. We do not sell this product without a valid prescription.

Can the Serevent inhaler canister be reused with different medications?

No, the Serevent inhaler is designed for use only with Serevent medication. Do not attempt to use it with other medications.

How do I order from your pharmacy?

Ordering from us is very simple. You can purchase online or call Customer Service at 1866.920.3784; for more information or to learn about the ordering process, visit our How to Order page.

How long does it take for Serevent to work?

Serevent is a long-acting medication and is not meant to provide immediate relief of asthma symptoms. It works over time to help prevent symptoms. You should use a short-acting inhaler (rescue inhaler) for sudden asthma symptoms.

How much is the shipping?

Our shipping fee is a flat rate of $10.00 per order. Our pharmacy focuses on offering you the lowest prices on high-quality products.

Is there a limit on how many inhalers I am allowed to order at one time?

CanadaPharmacyOnline.com can only dispense a maximum of a three-month supply of Serevent at once, per your doctor's prescription.

What should I do if I miss a dose?

Use the missed dose 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 use a double dose to make up for a missed dose.

Blog Post:

The Surprising Connection Between Asthma and Oral Health
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News:

Asthma And The Urgent Need For Improved Air Quality In Schools (article published on June 2, 2025)

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The information on this page is sourced from independent third parties contracted by CanadaPharmacyOnline. While we cannot guarantee its medical accuracy, we strongly recommend consulting a healthcare professional for personalized advice regarding medications or medical conditions.

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