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Elixophyllin Oral

Generic Name: THEOPHYLLINE SUSTAINED-RELEASE - ORAL
Pronounced: (thee-OFF-ih-lin)

Elixophyllin Oral Side Effects

Stomach pain/cramping, nausea, vomiting, diarrhea, loss of appetite, headache, trouble sleeping, irritability, restlessness, nervousness, shaking, flushing, and increased urination may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.

Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

Tell your doctor immediately if any of these unlikely but serious side effects occur:

  • confusion
  • dizziness
  • mental/mood changes
  • muscle twitching/pain/tenderness
  • weakness
  • rapid breathing


Tell your doctor immediately if any of these rare but very serious side effects occur:

  • fainting
  • fast/slow/irregular heartbeat
  • vomit that looks like coffee grounds
  • dark/tarry stools
  • seizures


A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any symptoms of a serious allergic reaction, including:

  • rash
  • red/scaly skin
  • itching/swelling (especially of the face/tongue/throat)
  • severe dizziness
  • trouble breathing


This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

In the US -

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

Elixophyllin Oral Precautions

Before using theophylline, tell your doctor or pharmacist if you are allergic to it; or to theobromine or caffeine; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of:

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