Theochron sustained-release tablets
Generic Name: theophylline (thee-OF-i-lin)
Brand Name: Theochron
Theochron sustained-release tablets is used for:
Preventing and treating symptoms and blockage of airway due to asthma or other lung diseases (eg, emphysema, bronchitis). It may also be used for other conditions as determined by your doctor.
Theochron sustained-release tablets is a xanthine derivative. It works by relaxing the muscle around the airways in the lungs, which allows them to widen and makes breathing easier. It also improves contraction of the diaphragm (the major breathing muscle) and decreases the response of the airways to irritants.
Do NOT use Theochron sustained-release tablets if:
- you are allergic to any ingredient in Theochron sustained-release tablets, similar medicines (eg, aminophylline), or xanthines (eg, caffeine, chocolate)
- you are using large amounts of other products that contain xanthine (such as chocolate or caffeinated drinks)
- you are taking dipyridamole intravenously (IV), febuxostat, halothane, or St. John's wort
Contact your doctor or health care provider right away if any of these apply to you.
Before using Theochron sustained-release tablets:
Some medical conditions may interact with Theochron sustained-release tablets. Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:
- if you are pregnant, planning to become pregnant, or are breast-feeding
- if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
- if you have allergies to medicines, foods, or other substances
- if you have a history of heart problems (eg, congestive heart failure, cor pulmonale), an irregular heartbeat, liver problems (eg, cirrhosis, hepatitis), viral infection, thyroid problems, increased acid levels in the body, brain or nerve problems, or seizures (eg, epilepsy)
- if you are in shock or have a fever, an ulcer, a severe infection, cystic fibrosis, or fluid in the lungs (pulmonary edema)
- if you smoke, are stopping or starting smoking, or are exposed to the smoke from cigarettes or marijuana
- if you are in the last 3 months of pregnancy
Some MEDICINES MAY INTERACT with Theochron sustained-release tablets. Tell your health care provider if you are taking any other medicines, especially any of the following:
- Aminoglutethimide, barbiturates (eg, phenobarbital), carbamazepine, hydantoins (eg, phenytoin), isoproterenol, moricizine, rifampin, St. John's wort, or sulfinpyrazone because they may decrease Theochron sustained-release tablets's effectiveness
- Allopurinol, beta-blockers (eg, propranolol), cimetidine, disulfiram, enoxacin, estrogen, febuxostat, fluvoxamine, interferon alpha, macrolide antibiotics (eg, clarithromycin, erythromycin), methotrexate, mexiletine, oral contraceptives (birth control pills), pentoxifylline, propafenone, quinolone antibiotics (eg, ciprofloxacin), tacrine, thiabendazole, ticlopidine, troleandomycin, verapamil, viloxazine, or zileuton because they may increase the risk of Theochron sustained-release tablets's side effects
- Ephedrine because the risk of side effects, such as nausea, nervousness, and trouble sleeping, may be increased
- Halothane because the risk of side effects such as irregular heartbeat may be increased
- Ketamine because the risk of seizures may be increased
- Adenosine, benzodiazepines (eg, diazepam, flurazepam, lorazepam, midazolam), dipyridamole IV, lithium, or nondepolarizing muscle relaxants (eg, pancuronium) because their effectiveness may be decreased by Theochron sustained-release tablets
This may not be a complete list of all interactions that may occur. Ask your health care provider if Theochron sustained-release tablets may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.
How to use Theochron sustained-release tablets:
Use Theochron sustained-release tablets as directed by your doctor. Check the label on the medicine for exact dosing instructions.
- Some foods may change the effectiveness or increase the side effects of Theochron sustained-release tablets. Talk to your doctor about how you should take Theochron sustained-release tablets with regard to food. Do not suddenly change your diet or eating habits without first checking with your doctor.
- Swallow Theochron sustained-release tablets whole. Do not break, crush, or chew before swallowing. Some brands of Theochron sustained-release tablets may be broken in half before taking. If you have difficulty swallowing the whole tablet, ask your pharmacist if your brand of medicine may be broken in half.
- Take Theochron sustained-release tablets at evenly spaced times throughout the day. Taking Theochron sustained-release tablets at the same time each day will help you remember to take it. Contact your doctor with any questions or concerns about the best way to take Theochron sustained-release tablets.
- If you miss a dose of Theochron sustained-release tablets, skip the missed dose and go back to your regular dosing schedule. Do not take 2 doses at once.
Ask your health care provider any questions you may have about how to use Theochron sustained-release tablets.
Important safety information:
- Drinking alcohol may increase the risk of side effects of Theochron sustained-release tablets. Talk to your doctor before drinking alcohol while you are taking Theochron sustained-release tablets.
- Tell your doctor or dentist that you take Theochron sustained-release tablets before you receive any medical or dental care, emergency care, or surgery.
- Do not take more than the recommended dose or use more often than prescribed without checking with your doctor. If your symptoms become worse, contact your doctor.
- You may notice the tablet shell in your stool with some brands of Theochron sustained-release tablets. This is normal and not a cause for concern.
- Carry an ID card at all times that says you take Theochron sustained-release tablets.
- Avoid large amounts of food or drink that have caffeine (eg, coffee, tea, cocoa, cola, chocolate).
- Notify your doctor if you develop a new illness, especially if it is accompanied by fever; if a chronic illness becomes worse; or if you start or stop smoking cigarettes or marijuana.
- Tell your doctor if another doctor prescribes a new medicine or tells you to stop using a medicine that you have already been taking. Tell your doctor if you start or stop any medicine, either prescription or over the counter.
- Theochron sustained-release tablets will not stop an asthma attack once one has started. Be sure to always carry appropriate rescue medicine (eg, bronchodilator inhaler) with you in case of an asthma attack.
- If you have more than one doctor, be sure to tell each of your doctors that you are taking Theochron sustained-release tablets.
- Diabetes patients - Theochron sustained-release tablets may affect your blood sugar. Check blood sugar levels closely. Ask your doctor before you change the dose of your diabetes medicine.
- Theochron sustained-release tablets may interfere with certain lab tests. Be sure your doctor and lab personnel know you are taking Theochron sustained-release tablets.
- Lab tests, including blood theophylline levels, may be performed while you use Theochron sustained-release tablets. These tests may be used to monitor your condition or check for side effects. Be sure to keep all doctor and lab appointments.
- Use Theochron sustained-release tablets with caution in the ELDERLY; they may be more sensitive to its effects.
- Caution is advised when using Theochron sustained-release tablets in CHILDREN, especially children younger than 1 year old; they may be more sensitive to its effects. Children may be more likely to experience mild, temporary behavior changes.
- PREGNANCY and BREAST-FEEDING: If you become pregnant, contact your doctor. You will need to discuss the benefits and risks of using Theochron sustained-release tablets while you are pregnant. Theochron sustained-release tablets is found in breast milk. If you are or will be breast-feeding while you use Theochron sustained-release tablets, check with your doctor. Discuss any possible risks to your baby.
Possible side effects of Theochron sustained-release tablets:
All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome:
Seek medical attention right away if any of these SEVERE side effects occur:
Irritability; mild, temporary caffeine-like effects (eg, headache, nausea, diarrhea, trouble sleeping); mild, temporary changes in behavior; restlessness; temporary increased urination.
Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); confusion; dizziness; fast breathing; fast or irregular heartbeat; heart rhythm problems; seizures; severe or persistent nausea, diarrhea, or headache; sleeplessness; tremors; vomiting.
This is not a complete list of all side effects that may occur. If you have questions about side effects, contact your health care provider. Call your doctor for medical advice about side effects. To report side effects to the appropriate agency, please read the Guide to Reporting Problems to FDA.
If OVERDOSE is suspected:
Contact 1-800-222-1222 (the American Association of Poison Control Centers), your local poison control center, or emergency room immediately. Symptoms may include agitation; chest pain; confusion; decreased urination; fast or irregular heartbeat; headache; increased thirst; irritability; loss of appetite; muscle pain or tenderness; nausea; nervousness; persistent increased urination; restlessness; seizures; severe or persistent diarrhea; stomach pain; tremors or twitching; vomiting, especially of blood.Proper storage of Theochron sustained-release tablets:
Store Theochron sustained-release tablets at room temperature, between 59 and 86 degrees F (15 and 30 degrees C), in a tightly closed container. Store away from heat, moisture, and light. Do not store in the bathroom. Do not refrigerate. Keep Theochron sustained-release tablets out of the reach of children and away from pets.
- If you have any questions about Theochron sustained-release tablets, please talk with your doctor, pharmacist, or other health care provider.
- Theochron sustained-release tablets is to be used only by the patient for whom it is prescribed. Do not share it with other people.
- If your symptoms do not improve or if they become worse, check with your doctor.
- Check with your pharmacist about how to dispose of unused medicine.
This information should not be used to decide whether or not to take Theochron sustained-release tablets or any other medicine. Only your health care provider has the knowledge and training to decide which medicines are right for you. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about Theochron sustained-release tablets. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to Theochron sustained-release tablets. This information is not specific medical advice and does not replace information you receive from your health care provider. You must talk with your healthcare provider for complete information about the risks and benefits of using Theochron sustained-release tablets.
Disclaimer: This information should not be used to decide whether or not to take this medicine or any other medicine. Only your health care provider has the knowledge and training to decide which medicines are right for you. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about this medicine. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to this medicine. This information is not specific medical advice and does not replace information you receive from your health care provider. You must talk with your healthcare provider for complete information about the risks and benefits of using this medicine.