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Theophylline and Potassium iodide oral

Important Note

The following information is intended to supplement, not substitute for, the expertise and judgment of your physician, pharmacist or other healthcare professional. It should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. Consult your healthcare professional before using this drug.


(poh-TASS-ee-um EYE-oh-dyed WITH thee-OFF-ih-lin)



Theophylline works in the lungs to open airways and make breathing easier. Potassium iodide has been used as an expectorant to help loosen and break up mucous. This combination medication is used to treat breathing disorders.

How To Use

This medication is usually taken after meals three times a day. Take each dose with a full glass (8 oz or 240 ml) of water, unless your doctor directs you otherwise. Take this medication as prescribed. Do not increase your dose or take this more often than directed.

Side Effects

Nervousness, headache, tremors, acne, loss of appetite, stomach upset, diarrhea or trouble sleeping may occur the first several days as your body adjusts to the medication. If any of these effects continue or become bothersome, inform your doctor. Notify your doctor if you develop: chest pain, muscle twitching, fever, weakness, unusual tiredness, swelling neck or throat, mouth sores, skin rash, nausea, vomiting, stomach pains, irregular heartbeat, numbness or tingling of the hands or feet, metallic taste. If you notice other effects not listed above, contact your doctor or pharmacist.


Tell your doctor if you have: thyroid disease, lung disease, kidney disease, Addison's disease, heart disease, high blood pressure, tuberculosis, stomach disorders, skin problems, allergies. Because this product contains iodine, its use is not recommended during pregnancy. Consult your doctor before using this medication. Since small amounts of this medication are found in breast milk, breast-feeding is not recommended while taking this medication. Consult your doctor.

Drug Interactions

Tell your doctor of any over-the-counter or prescription medication you may use, including: medication for thyroid disease, potassium supplements, diuretics (water pills), lithium, heart medications, antibiotics, St John's wort, ulcer medication, fluvoxamine (an SSRI antidepressant), birth control pills. Tell your doctor if you smoke or start or stop smoking while taking this medication. Smoking can alter the effects of this drug. Limit your intake of caffeine-containing foods (coffee, tea, colas, chocolate) which can increase the side effects of this medication. Do not start or stop any medicine without doctor or pharmacist approval.


If overdose is suspected, contact your local poison control center or emergency room immediately. Symptoms of overdose may include headache, vomiting, fast heartbeat, restlessness, and seizures.


Drink plenty of fluids, especially water while taking this medication. It will help to break up mucus and clear congestion.

Missed Dose

If you miss a dose, take it as soon as remembered; do not take it if it is near the time for the next dose, instead, skip the missed dose and resume your usual dosing schedule. Do not "double-up" the dose to catch up.


Store at room temperature between 59 and 86 degrees F (15 to 30 degrees C) away from heat and light. Do not store in the bathroom.