As experience with beta-blocker use in patients with congestive heart failu
re is increasing, enthusiasm for carvedilol use in these patients is also i
ncreasing. Dermatological reactions to carvedilol are rare and have not bee
n well described in the literature. A patient who developed an acute dermat
ological reaction after one dose of 3.125 mg carvedilol is presented. Given
the rapid onset of symptoms experienced by the patient after a single, sma
ll dose of carvedilol, clinicians should be aware of the potential adverse
effects of the drug.