Our data suggest that oral oseltamivir treatment reduces the duration and severity of acute influenza in healthy adults and may decrease the incidence of secondary complications.
Oral famciclovir, 500 mg or 750 mg three times daily for 7 days, is an effective and well-tolerated therapy for herpes zoster that decreases the duration of the disease's most debilitating complication, postherpetic neuralgia.
A case of verapamil-rifampin interaction is presented in a patient receiving verapamil for supraventricular tachycardia (SVT) and rifampin for pulmonary tuberculosis. The patient experienced recurrent symptomatic SVT, despite receiving verapamil 480 mg po q6h. Serum verapamil concentrations were determined to be extremely low. Discontinuation of rifampin and substitution of ethambutol resulted in an almost four-fold increase in verapamil levels with concurrent control of SVT. Rifampin may have increased the metabolism of verapamil by inducing hepatic microsomal enzymes resulting in low verapamil levels and failure to control SVT.
Both amrinone and dobutamine are efficacious in improving hemodynamics in older patients with severe congestive heart failure caused by left ventricular contractile dysfunction. Despite the effect of aging on beta-adrenergic responsiveness, dobutamine is at least as effective as amrinone but may be associated with a higher incidence of arrhythmic side effects.
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