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Aminophylline
- indication:For the treatment of bronchospasm due to asthma, emphysema and chronic bronchitis.
- pharmacologypharmacology:
- mechanism: Theophylline is structurally related to theobromine and caffeine. The precise mechanism of action of theophylline is not known, however, it is thought to be a phosphodiesterase inhibitor which may give a bronchodilatory effect. It also binds adenosine receptors.
- toxicity:
- absorprion:
- halflife: 7-9 hours
- roouteelimination:
- volumedistribution: * 0.3 to 0.7 L/kg
- clearance: * 0.29 mL/kg/min [postnatal age 3-15 days] * 0.64 mL/kg/min [postnatal age 25-57 days] * 1.7 mL/kg/min [ 1-4 years] * 1.6 mL/kg/min [4-12 years] * 0.9 mL/kg/min [13-15 years] * 1.4 mL/kg/min [16-17 years] * 0.65 mL/kg/min [Adults (16-60 years), non-smoking asthmatics] * 0.41 mL/kg/min [Elderly (>60 years). liver, and renal function] * 0.33 mL/kg/min [Acute pulmonary edema] * 0.54 mL/kg/min [COPD->60 years, stable non-smoker >1 year] * 0.48 mL/kg/min [COPD with cor pulmonale] * 1.25 mL/kg/min [Cystic fibrosis (14-28 years)] * 0.31 mL/kg/min [Liver disease -cholestasis] * 0.35 mL/kg/min [cirrhosis] * 0.65 mL/kg/min [acute hepatitis] * 0.47 mL/kg/min [Sepsis with multi-organ failure] * 0.38 mL/kg/min [hypothyroid] * 0.8 mL/kg/min [hyperthyroid]