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Theophylline dosing information

There are several readily identifiable causes of reduced theophylline clearance. If the total daily dose is not appropriately reduced in the presence of these risk factors, severe and potentially fatal theophylline toxicity can occur. The information on this page is not a substitute for the expertise, skill, knowledge and judgment of healthcare practitioners. The absence of a warning for a given drug or drug combination in no way should be construed to indicate that a drug or drug combination is safe, effective or appropriate for any given patient. Drugs. Consult your doctor before -feeding. Elderly patients are at a significantly greater risk of experiencing serious toxicity from theophylline than younger patients due to pharmacokinetic and pharmacodynamic changes associated with aging.

Theophylline has been reported

Decreases Theophylline clearance by inhibiting cytochrome P450 1A2. Smokers: Tobacco and marijuana smoking appears to increase the clearance of Theophylline by induction of metabolic pathways. Theophylline clearance has been shown to increase by approximately 50% in young adult tobacco smokers and by approximately 80% in elderly tobacco smokers compared to non-smoking subjects. Passive smoke exposure has also been shown to increase Theophylline clearance by up to 50%. Abstinence from tobacco smoking for one week causes a reduction of approximately 40% in Theophylline clearance. Careful attention to dose reduction and frequent monitoring of serum Theophylline concentrations are required in patients who stop smoking see . Use of nicotine gum has been shown to have no effect on Theophylline clearance.

What happens if I overdose Uniphyl?

Also called radiofrequency systems, they show promise for cellulite. Thus, blood samples taken 4 to 8 hours post-dosing should reference the peak serum level for most patients. About 6% of a theophylline dose is N-methylated to caffeine.

What conditions does theophylline treat

Metabolic side effects have included hypokalemia, hyperglycemia, respiratory alkalosis, hypophosphatemia, and hypomagnesemia. The magnitude of these abnormalities have been correlated with theophylline concentrations. Diffusion Techniques: methods that require measurement of zone diameters give the most precise estimate of susceptibility of to agents. One such standardized procedure 1 that has been recommended for use with disks to test susceptibility of organisms to enoxacin uses the 10-µg enoxacin disk. The pharmacokinetics of Theophylline vary widely among similar patients and cannot be predicted by age, sex, body weight or other demographic characteristics. In addition, certain concurrent illnesses and alterations in normal physiology see Table I and co-administration of other drugs see Table II can significantly alter the pharmacokinetic characteristics of Theophylline. Within-subject variability in metabolism has also been reported in some studies, especially in acutely ill patients.



Important information

Intended Use and Disclaimer: Should not be printed and given to patients. This information is intended to serve as a concise initial reference for health care professionals to use when discussing medications with a patient. You must ultimately rely on your own discretion, experience, and judgment in diagnosing, treating, and advising patients. Goldberg MJ, Spector R, Park GD, Johnson GF, Roberts P. The effect of sorbitol and activated charcoal on serum theophylline concentrations after slow-release theophylline. Uniphyl theophylline anhydrous tablet Tablets. Refer to PRECAUTIONS, Drug Interactions for further information regarding table. Average effect on steady state theophylline concentration or other clinical effect for pharmacologic interactions. Individual patients may experience larger changes in serum theophylline concentration than the value listed. Decrease dose by 25%even if no adverse effects are present. People taking theophylline should avoid -containing beverages. Feeling good is a sign that the medicine is working. What happens if I miss a dose? May lower theophylline seizure threshold. It looks lumpy because it pushes against connective tissue, causing the skin above it to pucker. That's why you can have it whether you're heavy or thin. Women are more likely to get it than men. Zafirlukast: Theophylline Derivatives may decrease the serum concentration of Zafirlukast. Zafirlukast may increase the serum concentration of Theophylline Derivatives. Not reported in a comparable manner. And if not caught quickly, -- swelling of the throat, cutting off the airway -- may result. Pediatric Use: Safety and effectiveness in pediatric patients and adolescents below the age of 18 years have not been established. Enoxacin causes arthropathy in animals.



Common side effects of theophylline

U400 on the other side. Institute extracorporeal removal if emesis, seizures, or cardiac arrhythmias cannot be adequately controlled see OVERDOSAGE, Extracorporeal Removal. Charcoal must be retained in, and pass through, the gastrointestinal tract to be effective; emesis should therefore be controlled by administration of appropriate antiemetics. Alternatively, the charcoal can be administered continuously through a nasogastric tube in conjunction with appropriate antiemetics. A single dose of sorbitol may be administered with the activated charcoal to promote stooling to facilitate clearance of the adsorbed theophylline from the gastrointestinal tract. Sorbitol alone does not enhance clearance of theophylline and should be dosed with caution to prevent excessive stooling which can result in severe fluid and electrolyte imbalances. Commercially available fixed combinations of liquid charcoal and sorbitol should be avoided in young children and after the first dose in adolescents and adults since they do not allow for individualization of charcoal and sorbitol dosing. Combination controller medications exist for patients whose asthma symptoms are not well controlled on inhaled corticosteroids alone. Adalimumab: May decrease the serum concentration of Theophylline Derivatives. Park GD, Radomski L, Goldberg MJ, Spector R, Johnson GF, Quee CK. Effects of size and frequency of oral doses of charcoal on theophylline clearance. Children 6-15 years and adults 16-60 years without risk factors for impaired clearance. HPLC techniques. Caffeine and xanthine metabolites in neonates or patients with renal dysfunction may cause the reading from some dry reagent office methods to be higher than the actual serum Theophylline concentration. This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist. Some believe that the effects of guarana are less intense and longer-lasting than caffeine. Studies have not established this. How much guarana should you take? In studies in which pregnant mice, rats and rabbits were dosed during the period of organogenesis, Theophylline produced teratogenic effects. What happens if I overdose? Remember that your doctor has prescribed this because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication not have serious side effects. General monitoring procedures: Electrocardiographic monitoring should be initiated on presentation and continued until the serum Theophylline level has returned to a non-toxic level. Serum electrolytes and glucose should be measured on presentation and at appropriate intervals indicated by clinical circumstances. Fluid and electrolyte abnormalities should be promptly corrected. Aminophylline is very similar to theophylline. Do not take containing theophylline while using aminophylline. There are several readily identifiable causes of reduced theophylline clearance. uroxatral



Theophylline overdose

Similarly, a patient with decreased Theophylline binding may have a sub-therapeutic total drug concentration while the pharmacologically active unbound concentration is in the therapeutic range. If only total serum Theophylline concentration is measured, this may lead to an unnecessary and potentially dangerous dose increase. In patients with reduced protein binding, measurement of unbound serum Theophylline concentration provides a more reliable means of dosage adjustment than measurement of total serum Theophylline concentration. National Institutes of Health 2007. National Asthma Education and Prevention Program Expert Panel Report 3: Guidelines for the Diagnosis and Management of Asthma NIH Publication No. 08-5846. Increasing the rate of theophzylline clearance by extracorporeal methods may rapidly decrease serum concentrations, but the risks of the procedure must be weighed against the potential benefit. Absorption: Theophylline is rapidly and completely absorbed after oral administration in solution or immediate-release solid oral dosage form. Monitor the patient and obtain a serum theophylline concentration in 2-4 hours to insure that the concentration is not increasing. can i buy zyloprim in spain zyloprim



Theophylline forms and strengths

Overview: Theophylline is rapidly and completely absorbed after oral administration in solution or immediate-release solid oral dosage form. Theophylline does not undergo any appreciable pre-systemic elimination, distributes freely into fat-free tissues and is extensively metabolized in the liver. Refer to for information regarding table. The exact relationship of these and other factors to nighttime serum concentrations and the clinical significance of such findings require additional study. Therefore, it is not recommended that Theo-24 when used as a once-a-day product be administered at night. Demethylation to 1-methylxanthine appears to be catalyzed either by cytochrome P-450 1A2 or a closely related cytochrome. In neonates, the N-demethylation pathway is absent while the function of the hydroxylation pathway is markedly deficient. The activity of these pathways slowly increases to maximal levels by one year of age. Caution is advised when using this drug in children because they may be more sensitive to its effects. Careful monitoring of side effects, drug levels, and dose adjustment is recommended. Certain conditions have been identified as causes of reduced theophylline clearance. High levels of theophylline cause increased side effects. Decreases theophylline clearance and pharmacologic interaction. Morning is the best time to do postural drainage, because it helps clear mucus that has built up during the night. What should I avoid while taking theophylline Uniphyl? Beta-Blockers Beta1 Selective: May diminish the bronchodilatory effect of Theophylline Derivatives. Management: Monitor for reduced theophylline efficacy during concomitant use with any beta-blocker. Beta-1 selective agents are less likely to antagonize theophylline than nonselective agents, but selectivity may be lost at higher doses. While simultaneously instituting treatment, contact a regional poison center to obtain updated information and advice on individualizing the recommendations that follow. Lift weights at least 2 days a week. Focus on your legs, hips, and backside. Strong, defined muscles under a thinner fat layer will make your skin smoother and less puckered. Decreases theophylline clearance by inhibiting cytochrome P450 1A2. Treatment of seizures Because of the high morbidity and mortality associated with theophylline-induced seizures, treatment should be rapid and aggressive.



Reviews for theophylline

CYP1A2 Inhibitors Moderate: May decrease the metabolism of CYP1A2 Substrates. Extravasation: Vesicant; ensure proper catheter or needle position prior to and during infusion. Avoid extravasation. GINA 2015. Both guidelines recommend against theophylline for the treatment of asthma exacerbations due to poor efficacy and safety concerns GINA 2016; NAEPP 2007. Absorption Theophylline is rapidly and completely absorbed after oral administration in solution or immediate-release solid oral dosage form. The absence of a warning for a given drug or drug combination in no way should be construed to indicate that the drug or drug combination is safe, effective or appropriate for any given patient. Multum does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist. Postural drainage is getting in positions that make it easier for mucus to drain. There was no significant interaction between ZYFLO and any of these drugs. In patients with COPD clinical studies have shown that theophylline decreases dyspnea, air trapping, the work of breathing, and improves contractility of diaphragmatic muscles with little or no improvement in pulmonary function measurements. Children 12-15 years and adults 16-60 years without risk factors for impaired clearance. Peginterferon Alfa-2b: May increase the serum concentration of CYP1A2 Substrates. Zileuton: May increase the serum concentration of Theophylline. Management: Reduce theophylline dose by 50% upon initiation of zileuton therapy. If theophylline is added to existing zileuton therapy, use a lower starting dose. Monitor for increased serum concentrations and effects of theophylline. Clinical, Cosmetic and Investigational Dermatology: “Cryolipolysis for noninvasive body contouring: clinical efficacy and patient satisfaction. buy sotalol itch stopping cream sotalol



Theophylline side effects

Shannon M "Predictors of major toxicity after theophylline overdose. No, not really. But there are steps you can take to get rid of cellulite. Do not start, stop, or change the dosage of any medicines without your doctor's approval. Fever, regardless of its underlying cause, can decrease the clearance of theophylline. Anticholinergic agents can help decrease sputum production. Examples of these medications include ipratropium Atrovent and tiotropium Spiriva. Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed. How should I take theophylline Uniphyl? Serum theophylline concentrations may continue to increase after presentation of the patient for medical care as a result of continued absorption of theophylline from the gastrointestinal tract. Serial monitoring of serum theophylline concentrations should be continued until it is clear that the concentration is no longer rising and has returned to non-toxic levels. Chromones stabilize mast cells allergic cells but are rarely used in clinical practice. Cromolyn and nedocromil are in this drug class. COPD may be more susceptible to the respiratory depressant effects of anticonvulsants. Theophylline may also be used for purposes not listed in this medication guide. Anti-IL-5 agents can be used in moderate to severe asthma with elevated eosinophils. These include mepolizumab Nucala and reslizumab Cinqair. nimotop pill price in south africa



Theophylline consumer information

This medication may interfere with certain lab tests such as blood sugar, cholesterol, uric acid, dipyridamole-thallium imaging tests possibly causing false test results. Make sure lab personnel and all your doctors know you use this drug. III are current as of February 9, 1995. Fever Fever, regardless of its underlying cause, can decrease the clearance of theophylline. The magnitude and duration of the fever appear to be directly correlated to the degree of decrease of theophylline clearance. Other manifestations of theophylline toxicity include increases in serum calcium, creatine kinase, myoglobin and leukocyte count, decreases in serum phosphate and magnesium, acute myocardial infarction, and urinary retention in men with obstructive uropathy. Theophylline toxicity referred to a regional poison center for consultation. Both the N-demethylation and hydroxylation pathways of theophylline biotransformation are capacity-limited. Theophylline extended-release tablets were administered with and without food. Subjects were fasted overnight and received a single 300 mg tablet early the following morning. Peptic ulcer disease: Use with caution in patients with active peptic ulcer disease; use may exacerbate peptic ulcer. If you do not have a dose-measuring device, ask your pharmacist for one. Once-Daily Dosing: The slow absorption rate of this preparation may allow once-daily administration in adult non-smokers with appropriate total body clearance and other patients with low dosage requirements. Once-daily dosing should be considered only after the patient has been gradually and satisfactorily titrated to therapeutic levels with q12h dosing. Once-daily dosing should be based on twice the q12h dose and should be initiated at the end of the last q12h dosing interval. The mechanism of theophylline-induced seizures has not been determined. Seizures are generally focal with secondary generalization. Permanent neurologic deficits have been reported and morbidity may be high, especially in the elderly, patients with severe underlying disease, and patients with prolonged, uncontrolled seizure activity. The onset of seizures is not always preceded by less severe symptoms of aminophylline toxicity. Patients with an abnormal neurologic history, including a history of seizures, cerebral infarct, or head trauma, may be predisposed to seizure activity. If theophylline is used in these types of patients, serum concentrations should be monitored closely and maintained in the low, therapeutic range.



Where can I get more information?

Who should not take ZYFLO? Covelli HD, Knodel AR, Heppner BT "Predisposing factors to apparent theophylline-induced seizures. Each extended-release tablet for oral administration contains either 300 mg or 450 mg of anhydrous Theophylline. Tablets also contain as inactive ingredients: hypromellose, lactose monohydrate, magnesium stearate and povidone. This medication does not work right away and should not be used for sudden attacks of breathing trouble. Get medical help right away if your worsen or if you are using your quick-relief more than usual or more often than prescribed. Patel AK, Skatrud JB, Thomsen JH "Cardiac arrhythmias due to oral aminophylline in patients with chronic obstructive pulmonary disease. generic indocin order store canada



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What are the possible side effects of theophylline


Theophylline decreases phenytoin 40%

Decreases Theophylline clearance by inhibiting hydroxylation and demethylation. The listing of drugs in Tables II and III are current as of June, 1996. Treat overdose as indicated see recommendations for chronic overdosage. If Theophylline is subsequently resumed, decrease dose by at least 50% and recheck serum concentration after 3 days to guide further dosage adjustment. What other drugs will affect theophylline? ehet.info oxcarbazepine

Theophylline warnings

Before having surgery, tell your doctor or dentist that you are taking this medication. In patients with chronic asthma, including patients with severe asthma requiring inhaled corticosteroids or alternate-day oral corticosteroids, many clinical studies have shown that theophylline decreases the frequency and severity of symptoms, including nocturnal exacerbations, and decreases the "as needed" use of inhaled beta 2 agonists. Theophylline has also been shown to reduce the need for short courses of daily oral prednisone to relieve exacerbations of airway obstruction that are unresponsive to bronchodilators in asthmatics.

Theophylline drug interactions

Teriflunomide: May decrease the serum concentration of CYP1A2 Substrates. Disclaimer: The indications, uses and warnings for individual medications outside the USA are determined by local regulatory bodies in each country or region. The Drugs. Cyclosporine: Elevated serum levels of cyclosporine have been reported with concomitant use of cyclosporine with other members of the quinolone class. cephalexin marriott

Stamford, CT 06901-3431 March 17, 2004

Elevated serum CK-MB levels have been associated with theophylline toxicity in the absence of cardiac disease. CK-MB levels have returned to normal following discontinuation of theophylline therapy. Side effects may go away after you take the medicine for a while. Theo-24 is contraindicated in patients with a history of hypersensitivity to theophylline or other components in the product. Theophylline decreases phenytoin absorption. Decrease dose by 25% even if no adverse effects are present. Recheck serum concentration after 3 days to guide further dosage adjustment. minocin

Dosage reduction may alleviate the caffeine-like adverse effects in these patients, however, persistent adverse effects should result in a reevaluation of the need for continued Theophylline therapy and the potential therapeutic benefit of alternative treatment. United States for delivery via a nebulizer. Cromolyn is suggested as an alternative medication to inhaled corticosteroids for asthma control, usually in mild asthma. It is not a commonly used asthma medication. Peritoneal dialysis is ineffective for theophylline removal; exchange transfusions in neonates have been minimally effective. Theophylline clearance for up to 24 hours. lopressor

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