التداخل بين بنزفيتامين ولابيتالول

Amphetamines may decrease the hypotensive effect of antihypertensives.

Labetalol has also been reported to produce a false-positive test for amphetamine when screening urine for the presence of drugs using the commercially available assay methods.

When patients being treated with labetalol have a positive urine test for amphetamine using these techniques, confirm using more specific methods, such as a gas chromatographic-mass spectrometer technique.