Triamcinolone
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Azmacort

Triamcinolone (trade names Kenalog®, Aristocort®, Nasacort®, Tri-Nasal®) is a synthetic corticosteroid given orally, by injection, inhalation, or as a topical cream. An injection is used in many situations where a lasting corticosteroid effect is required. This includes replacement therapy in people whose adrenal glands are not producing enough natural steroids (adrenal insufficiency) and decreasing inflammation in certain disease states. more...

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Corticosteroids such as triamcinolone decrease inflammation by acting within cells to prevent the release of certain chemicals that are important in the immune system. These chemicals are normally involved in producing immune and allergic responses, resulting in inflammation. By decreasing the release of these chemicals in a particular area, inflammation is reduced. This can help control a wide number of disease states, characterised by excessive inflammation. They include severe allergic reactions, inflammation of the lungs in asthma and inflammation of the joints in arthritis. The injection can be given as a single dose to people who suffer from hayfever and do not respond to conventional therapy. This can relieve symptoms over the entire hayfever period. Triamcinolone may also be given by injection directly into a joint to relieve inflammation and pain and increase mobility of the affected joint, in conditions such as arthritis.

Triamcinolone also decreases the numbers of white blood cells circulating in the blood. This is useful for the treatment of certain types of leukaemia, where there is an abnormally large production of certain white blood cells. It is also used to treat some autoimmune diseases, which are caused by the immune system attacking the body's own tissues.

Triamcinolone is used in much higher doses than the levels of corticosteroids produced naturally by the body, and as such, the usual actions of corticosteroids become exaggerated and can be observed as side effects of this medicine.

Different triamcinolone salts are available, including acetonide, hexacetonide and diacetate.

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Recognition and management of exercise-induced bronchospasm - Practical Therapeutics
From American Family Physician, 2/15/03 by Taru Sinha

The National Asthma Education and Prevention Program (1) is a comprehensive statement of guidelines for the diagnosis and management of asthma. The expert panel (1) uses the term exercise-induced bronchospasm (EIB) to describe a condition defined as the presence of symptoms in relation to athletic performance or a significant decrease in forced expiratory volume at one second (FE[V.sub.1]) in relation to exercise. Typically, EIB begins after several minutes of vigorous physical activity and reaches its peak in five to 10 minutes.

Epidemiology

Exercise-induced bronchospasm is caused by the loss of heat, water, or both from the lungs during exercise, stemming from hyperventilation of air that is drier and cooler than that in the respiratory tree. Between 80 and 90 percent of patients with asthma also have EIB. (2) However, many patients have bronchospasm only during exercise. One study (3) has found unrecognized EIB in as many as 29 percent of athletes presenting for athletic preparticipation examinations.

Diagnosis

The diagnosis of EIB is based on a detailed history suggestive of shortness of breath, decreased exercise endurance, chest tightness, cough, or wheezing during or immediately following sustained exercise (Table 1). Some patients also report having an upset stomach or a sore throat. Symptoms that occur during the first five minutes of exercise are usually not indicative of EIB; however, these symptoms may suggest other changes in pulmonary function, poorly controlled underlying asthma, poor conditioning, or injury to the chest wall muscle. Persons who engage in physical activities that involve only short bursts of exertion may perform well without becoming symptomatic. A detailed history should be obtained from family, coaches, and teammates, if possible, because the athlete may deny symptoms as a result of peer pressure or concerns about potential inadequacy or the inability to continue playing.

Most patients with EIB have a normal physical examination, with no evidence of wheezing on auscultation. Nevertheless, a focused physical examination should be performed to exclude sinusitis, nasal polyps, a deviated septum, or vocal cord dysfunction.

The most objective measure of EIB is a pulmonary function test coupled with an appropriate exercise challenge (Table 2). (4) However, full pulmonary function testing is rarely required. If symptoms are strongly suggestive of EIB, a trial of therapy using a short-acting bronchodilator may be useful to see if the patient significantly improves in performance and symptoms.

Management

The goal of management is to prevent or reduce the symptoms of EIB, to enable patients to exercise at all intensity levels without serious respiratory limitations. Interventions should be tailored to the patient; a school-aged child participating in recreational and school activities should be treated differently from an elite athlete. Persons should not be excluded from participating in sports or working at jobs with heavy physical demand based solely on EIB. For example, in a study of U.S. Army recruits, (5) EIB symptoms did not hinder physical performance gains, even during basic training.

NONPHARMACOLOGIC THERAPY

Patients, and anyone involved in their care, should be educated about the nature of EIB, its triggers, and how to control it with or without medications. Table 3 lists simple nonpharmacologic methods for reducing the likelihood of EIB. (6)

Physical conditioning increases a patient's ability to work at a lower level of vital capacity, decreasing the cooling and drying stimuli, resulting in less bronchospasm. (7) Athletes should always warm up before vigorous exercise and take advantage of a "refractory period" induced by short bursts of exercise. (7,8) Awareness of environmental allergens such as pollen or animal dander can prevent concomitant aggravation of asthma by allergens and exercise.

PHARMACOLOGIC THERAPY

Considerable data show that most asthma medications can effectively control EIB. Figure 1 is a comprehensive management algorithm that incorporates diagnostic and therapeutic issues.

[FIGURE 1 OMITTED]

Traditionally, the diagnosis is based on a detailed history with symptoms suggestive of EIB and a normal FE[V.sub.1] at rest. A therapeutic trial may be instituted in these patients. In patients whose response is less than optimal following an adequate therapeutic trial, the threshold for conducting baseline pulmonary function testing should be low. These patients may have undiagnosed asthma or other pulmonary conditions, and the first priority should be to optimize pulmonary function testing with the use of inhaled steroids. Table 4 lists the medications that are available to treat EIB.

Beta Agonists. Inhaled beta agonists are first-line medications in the management of EIB, both as prophylaxis and to treat the bronchospasm that occurs with exercise. A short-acting beta agonist should be taken 15 minutes before exercise and may be repeated as necessary. (9) Common beta agonists include metaproterenol (Alupent); albuterol (Ventolin); bitolterol mesylate (Tornalate); pirbuterol (Maxair); terbutaline sulfate (Bricanyl); and formoterol (Foradil Aerolizer). (10) Formoterol, a long-acting agent, has bronchoprotective effects for up to 12 hours. (11) It was approved by the U.S. Food and Drug Administration (FDA) in February, 2001, for pretreatment in children 12 years or older. Formoterol is available as an inhalation powder and is to be used with an aerolizer inhaler (Table 4).

Salmeterol (Serevent) is a long-acting beta agonist approved by the FDA for use in persons 12 years and older. It has been shown to protect against EIB for up to 12 hours after use. (12) [Evidence level A: randomized controlled trial (RCT)] However, continuous use of beta agonists, especially salmeterol (13) and formoterol, (14) has been documented to cause tachyphylaxis.

Cromolyn and Nedocromil. Cromolyn sodium (Intal) and nedocromil (Tilade) are anti-inflammatory agents that can work in cooperation with beta agonists, inhibiting the early bronchospastic phase and the late inflammatory phase of EIB through inhibition of mast cell mediator release and calcium influx. These agents are effective in 70 to 85 percent of patients and have minimal side effects. (15) A meta-analysis (16) of eight RCTs showed no significant differences in efficacy between cromolyn and nedocromil; nedocromil has a more rapid onset of action and seems to have a greater effect on those with more severe disease but is often rejected because of its offensive taste.

Inhaled Corticosteroids. Inhaled corticosteroids have been demonstrated to be useful in the treatment of EIB (17,18) (Table 4). These agents are safe and effective when used in the recommended dosage (below 400 mcg per day) and require four weeks to achieve maximal effect. Side effects such as oral candidiasis and hoarseness can be diminished or entirely eliminated by adding a spacer to the inhaler and by gargling with water after use and expectorating the fluid. (19)

Theophylline. Theophylline has a long and controversial history as a bronchodilator. Its adverse side effect profile, multiple drug interactions, and unpredictable absorption make it a tertiary agent in the treatment of EIB. Theophylline also has been anecdotally reported to affect concentration and learning behavior and should be used with caution in school-aged children.

Anticholinergics. Ipratropium bromide, a derivative of atropine with modest bronchodilating properties, is used as a tertiary agent. (20) For optimal efficacy, patients should have baseline pulmonary function tests in the normal range.

Additional Agents. Evidence exists to show that leukotriene receptor antagonists, such as montelukast (Singulair) (21) and zafirlukast (Accolate), and 5-lipoxygenase inhibitors, such as zileuton (Zyflo), (22) provide substantial protection against EIB when used individually and in combination with inhaled corticosteroids (23); however, considerable variation was observed among patients. Other options, such as inhaled furosemide (Lasix), (24) vitamin C, (25) inhaled heparin, (26) antihistamines, calcium channel blockers, and reduced dietary salt intake, (27) have been studied as potential treatments for EIB. Physicians and patients should wait for results of clinical trials before choosing these potential therapies.

Final Comment

Exercise-induced bronchospasm results from a transient increase in airway resistance producing various symptoms (cough, wheezing, chest tightness, or pain) that may appear five to 10 minutes after initiation of exercise. EIB may present without symptoms, simply manifesting as a patient refusing to participate in exercise or competitive sports because of an unrecognized ability to breathe normally. The condition is usually treated with short-acting bronchodilators, with or without the addition of anti-inflammatory agents, taken 15 to 30 minutes before initiation of exercise. Medications should be accompanied by warm-up and cool-down exercises and nasal breathing to attenuate the symptoms.

Failure to respond positively to these initial measures should prompt pulmonary function testing with a bronchodilator, exercise challenge testing and, possibly, referral to a specialist. Alternative diagnoses, such as vocal cord dysfunction and glottic dysfunction, should be considered if the patient continues to be symptomatic.

The diagnosis and treatment of EIB is both simple and immensely rewarding for the family physician and the patient. Appropriate management allows most patients to enjoy the benefits of exercise and their chosen sports, leading to a healthier lifestyle.

The authors indicate that they do not have conflicts of interest. Sources of funding: none reported.

REFERENCES

(1.) National Asthma Education and Prevention Program (National Heart, Lung, and Blood Institute). Guidelines for the diagnosis and management of asthma: expert panel report 2. Bethesda, Md.: U.S. Dept. of Health and Human Services, Public Health Service, National Institutes of Health, National Heart, Lung, and Blood Institute, 1997; NIH publication no. 97-4051.

(2.) Kawabori I, Pierson WE, Conquest LL, Bierman CW. Incidence of exercise-induced asthma in children. J Allergy Clin Immunol 1976;58:447-55.

(3.) Rupp NT, Guill MF, Brudno DS. Unrecognized exercise-induced bronchospasm in adolescent athletes. Am J Dis Child 1992;146:941-4.

(4.) Randolph C. Exercise-induced asthma: update on pathophysiology, clinical diagnosis, and treatment. Curr Probl Pediatr 1997;27:53-77.

(5.) Sonna LA, Angel KC, Sharp MA, Knapik JJ, Patton JF, Lilly CM. The prevalence of exercise-induced bronchospasm among US Army recruits and its effects on physical performance. Chest 2001;119:1676-84.

(6.) Tan RA, Spector SL. Exercise-induced asthma. Sports Med 1998;25:1-6.

(7.) Reiff DB, Choudry NB, Pride NB, Ind PW. The effect of prolonged submaximal warm-up exercise on exercise-induced asthma. Am Rev Respir Dis 1989; 139:479-84.

(8.) Schnall RP, Landau LI. Protective effects of repeated short sprints in exercise-induced asthma. Thorax 1980;35:828-32.

(9.) Boulet LP. Long- versus short-acting beta 2-agonists. Implications for drug therapy. Drugs 1994; 47:207-22.

(10.) Ferrari M, Balestreri F, Baratieri S, Biasin C, Oldani V, Lo Cascio V. Evidence of the rapid protective effect of formoterol dry-powder inhalation against exercise-induced bronchospasm in athletes with asthma. Respiration 2000;67:510-3.

(11.) Vilsvik J, Ankerst J, Palmqvist M, Persson G, Schaanning J, Schwabe G, et al. Protection against cold air and exercise-induced bronchoconstriction while on regular treatment with Oxis. Respir Med 2001;95:484-90.

(12.) Bisgaard H. Long-acting beta(2)-agonists in management of childhood asthma: A critical review of the literature. Pediatr Pulmonol 2000;29:221-34.

(13.) Grove A, Lipworth BJ. Bronchodilator subsensitivity to salbutamol after twice daily salmeterol in asthmatic patients. Lancet 1995;346:201-6.

(14.) Garcia R, Guerra P, Feo F, Galindo PA, Gomez E, Borja J, et al. Tachyphylaxis following regular use of formoterol in exercise-induced bronchospasm. J Investig Allergol Clin Immunol 2001;11:176-82.

(15.) Cavallo A, Cassaniti C, Glogger A, Magrini H. Action of nedocromil sodium in exercise-induced asthma in adolescents. J Investig Allergol Clin Immunol 1995;5:286-8.

(16.) Kelly K, Spooner CH, Rowe BH. Nedocromil sodium versus sodium cromoglycate for preventing exercise-induced bronchoconstriction in asthmatics (Cochrane Review). Cochrane Database Syst Rev 2002;(4):CD002731.

(17.) Mahler DA. Exercise-induced asthma. Med Sci Sports Exerc 1993;25:554-61.

(18.) Thio BJ, Slingerland GL, Nagelkerke AF, Roord JJ, Mulder PG, Dankert-Roelse JE. Effects of single-dose fluticasone on exercise-induced asthma in asthmatic children: a pilot study. Pediatr Pulmonol 2001;32:115-21.

(19.) Henriksen JM, Dahl R. Effects of inhaled budesonide alone and in combination with low-dose terbutaline in children with exercise-induced asthma. Am Rev Respir Dis 1983;128:993-7.

(20.) Tan RA, Spector SL. Exercise-induced asthma: diagnosis and management. Ann Allergy Asthma Immunol 2002;89:226-35.

(21.) Leff JA, Busse WW, Pearlman D, Bronsky EA, Kemp J, Hendeles L, et al. Montelukast, a leukotriene-receptor antagonist, for the treatment of mild asthma and exercise-induced bronchoconstriction. N Engl J Med 1998;339:147-52.

(22.) Meltzer SS, Hasday JD, Cohen J, Bleecker ER. Inhibition of exercise-induced bronchospasm by zileuton: a 5-lipoxygenase inhibitor. Am J Respir Crit Care Med 1996;153:931-5.

(23.) Bjermer L, Diamant Z. The use of leukotriene receptor antagonists (LRTAs) as complementary therapy in asthma. Monaldi Arch Chest Dis 2002;57:76-83.

(24.) Novembre E, Frongia G, Lombardi E, Resti M, Zammarchi E, Vierucci A. The preventive effect and duration of action of two doses of inhaled furosemide on exercise-induced asthma in children. J Allergy Clin Immunol 1995;96:906-9.

(25.) Cohen HA, Neuman I, Nahum H. Blocking effect of vitamin C in exercise-induced asthma. Arch Pediatr Adolesc Med 1997;151:367-70.

(26.) Ahmed T, Garrigo J, Danta I. Preventing bronchoconstriction in exercise-induced asthma with inhaled heparin. N Engl J Med 1993;329:90-5.

(27.) Gotshall RW. Exercise-induced bronchoconstriction. Drugs 2002;62:1725-39.

Members of various medical faculties develop articles for "Practical Therapeutics." This article is one in a series coordinated by the Department of Family Practice at the Medical College of Wisconsin, Milwaukee. Guest editors of the series are Linda N. Meurer, M.D., M.P.H., and Douglas Bower, M.D.

TARU SINHA, M.D., currently is associate director at Mountainside Family Practice Residency, Verona, N.J. Dr. Sinha received her medical degree from Lady Hardinge Medical College, Delhi University, Delhi, India. She completed a family practice residency at JFK Medical Center, Edison, N.J., affiliated with the University of Medicine and Dentistry of New Jersey. Previously, she was assistant professor in the Department of Family and Community Medicine at the Medical College of Wisconsin, Milwaukee.

ALAN K. DAVID, M.D., is professor and chair of the Department of Family and Community Medicine at the Medical College of Wisconsin. Dr. David received his medical degree from the University of Missouri-Columbia, Columbia, Mo. He is a diplomate of the American Board of Family Practice and a past president of the Society of Teachers of Family Medicine.

Address correspondence to Taru Sinha, M.D., Mountainside Family Practice Residency, 799 Bloomfield Ave., Verona, NJ 07044 (e-mail: taru.sinha@ahsys.org). Reprints are not available from the authors.

COPYRIGHT 2003 American Academy of Family Physicians
COPYRIGHT 2003 Gale Group

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