Comparative evaluation of the effects of labetalol, verapamil and diltiazem on antipyrine and indocyanine green clearances.

Abstract:

:The effects of labetalol, diltiazem and verapamil on antipyrine and indocyanine green clearance were evaluated in a placebo-controlled, repeated measures evaluation. Twelve healthy subjects received either labetalol (200 mg every 12 hours), diltiazem (90 mg. every 8 hours), verapamil (80 mg every 8 hours), or placebo (every 12 hours) for 4 days. On the morning of Day 3 immediately following their dose, the subjects assumed the supine position for 90 minutes, after which time a 0.5 mg/kg dose of indocyanine green was administered. Blood samples were obtained serially over a 20 minutes period for indocyanine green plasma concentration determinations by HPLC. Ten minutes later, subjects ingested a 1.2 Gm. dose of antipyrine and blood samples were obtained over a 48 hour period for antipyrine plasma concentration determinations by HPLC. A 2 week washout period separated treatment sequences. Mean (SD) antipyrine clearance (L/hr/kg) following diltiazem [0.028 (0.010)] and verapamil [0.030 (0.012)] treatment was significantly lower than that observed following placebo [0.039 (0.012)]. Antipyrine clearance following labetalol administration [0.033 (0.010)] was not significantly different from that observed following placebo, diltiazem or verapamil administration. No effects of these drugs on indocyanine green clearance could be detected.

journal_name

J Clin Pharmacol

authors

Rocci ML Jr,Vlasses PH,Lener ME,Fruncillo RA,Sirgo MA

doi

10.1002/j.1552-4604.1989.tb03250.x

subject

Has Abstract

pub_date

1989-10-01 00:00:00

pages

891-5

issue

10

eissn

0091-2700

issn

1552-4604

journal_volume

29

pub_type

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