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Theophylline LA

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What is Generic?

What is a Generic Drug?

A generic drug is a copy of the brand-name drug with the same dosage, safety, strength, quality, consumption method, performance, and intended use. Before generics become available on the market, the generic company must prove it has the same active ingredients as the brand-name drug and works in the same way and in the same amount of time in the body.

The only differences between generics and their brand-name counterparts is that generics are less expensive and may look slightly different (eg. different shape or color), as trademarks laws prevent a generic from looking exactly like the brand-name drug.

Generics are less expensive because generic manufacturers don't have to invest large sums of money to develop a drug. When the brand-name patent expires, generic companies can manufacture a copy of the brand-name and sell it at a substantial discount.


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Theophylline is a lung disease and asthma treatment medication available by prescription and Theophylline is used to prevent wheezing and shortness of breath suffered by asthma and COPD sufferers. Elixophyllin is a xanthine class drug that works by relaxing the muscles around the airway and promotes them opening up more and breathing is made easier. This medication also decreases the lungs’ response to irritants. Patients with asthma using Theophylline will usually still continue to use an asthma maintenance inhaler. Buy Theophylline from Canada and Canpharm and get the best price on it.

What is Asthma?

Asthma is a lung and pulmonary health disorder where inflammation causes the airways into the lungs to become constricted and limiting the airflow into the lungs for breathing as a result. Symptoms can include shortness of breath, wheezing, and cough. The disorder is manageable, and most sufferers will not have to go for medical attention when having an asthma attack, but for some it may be required based on the severity of their asthma.

Fact Table
Formula C7H8N4O2
License FDA approved
Bioavailability Approximately 100% when taken orally
Legal status Prescription only
Chemical Name Theophylline LA
Elimination half-life About 8 hours (varies widely depending on age and other factors)
Dosage (Strength) Available in 100 mg, 200 mg, 300 mg, and 400 mg tablets
Pregnancy advice Use only if the potential benefit justifies the potential risk to the fetus; category C in the US
Brands Elixophyllin, Theo-24, Uniphyl, others
Protein binding 40% bound to plasma proteins
PubChem CID 2153
MedlinePlus number a681006
ATC code R03DA04
DrugBank ID DB00277
KEGG ID D00371
Routes of administration Oral

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Standard dosage for Theophylline is to take the medication 1 or 2x daily but dosage and frequency may vary based on age and lab test results. Always take your medication exactly as indicated in your prescription.


The active ingredient in Theophylline is Elixophyllin.


Let your doctor know of any history of stomach or intestinal ulcers, seizures, thyroid disease, heart problems, liver disease, or high blood pressure (hypotension) before starting on Theophylline

If fever is developed after taking this medication, you should stop use immediately and meet with your doctor again

Older adults may be more susceptible to Theophylline side effects, especially irregular heartbeat and sleeping difficulties

Women who are pregnant or plan to become pregnant should discuss the use of Theophylline with their doctor, as it may be more of a risk during the last 3 months of pregnancy

Be aware of medication expiry date


Negative drug interactions may occur between Theophylline and other Rx medications, including cimetidine, disulfiram, fluvoxamine, interferon, mexiletine, propranolol, rifampin, carbamazepine, phenytoin, ticlopidine, and viloxazine. Let your doctor know of all medications you are currently taking before getting a prescription and proceeding to buy Theophylline online.

Side Effects

Side effects from Theophylline usage may occur, and some users may experience nausea, vomiting, stomach or abdominal pain, headache, sleeping difficulties, diarrhea, irritability, restlessness, or increased urination. If side effects are experienced, you may want to stop use and meet with a doctor again to discuss asthma and COPD treatment medication alternatives.

Remember, these are not exhaustive lists, and it's important to consult with a healthcare professional for personalized advice and guidance. If you prefer, you may contact the U.S. Food and Drug Administration (FDA) directly. Visit or call 1-800-FDA-1088

Frequently Asked Questions about Theophylline

How long can a dog stay on Theophylline?

The duration that any animal will remain on an asthma medication is a determination that will be made by a veterinarian.

Is Theophylline a bronchodilator?

No, Theophylline is a prescription muscle relaxant medication for asthma and does not work to dilate bronchioles in the lungs.

Can Theophylline be crushed?

No, this medication should only be taken whole with water, and you should not crush or chew Theophylline tablets.

Can Theophylline be stopped immediately?

You should not stop using this medication suddenly. If you intend to stop using Theophylline for asthma or COPD treatment, it's best to discuss that course of action with your doctor.

Can you buy Theophylline over the counter?

No, Theophylline is a prescription medication, and you will need to submit a prescription in order to have the pharmacy dispense this medication to you.

IMPORTANT NOTE: The above information is intended to increase awareness of health information and does not suggest treatment or diagnosis. This information is not a substitute for individual medical attention and should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. See your health care professional for medical advice and treatment.