Levodopa and Rasagiline interaction
Levodopa and Rasagiline: both prescribing labels flag this combination with the strongest language, such as a contraindication, a boxed warning, or an instruction to avoid it.
Do not combine without a prescriber's guidance. The label language below is the strongest FDA uses.
What the FDA labels say
From the Levodopa (Inbrija) label · effective 2026-01-16
INBRIJA is contraindicated in patients currently taking a nonselective monoamine oxidase (MAO) inhibitor (e.g., phenelzine and tranylcypromine) or who have recently (within 2 weeks) taken a nonselective MAO inhibitor.
INBRIJA is contraindicated in patients currently taking a nonselective monoamine oxidase (MAO) inhibitor or who have recently (within 2 weeks) taken a nonselective MAO inhibitor ( 4 , 7.1 )
Monoamine Oxidase (MAO) Inhibitors The use of nonselective MAO inhibitors with INBRIJA is contraindicated [see Contraindications (4) ] .
Discontinue use of any nonselective MAO inhibitors at least two weeks prior to initiating INBRIJA.
From the Rasagiline label · effective 2020-06-30
Decreasing the levodopa dose may lessen or eliminate this side effect ( 5.7 )
In Study 3, rasagiline (1 mg/day) given in conjunction with levodopa, produced an increased incidence of significant blood pressure elevation (systolic > 180 or diastolic > 100 mm Hg) of 4% compared to 3% for placebo [see Adverse Reactions ( 6.1 )] .
When used as an adjunct to levodopa (Studies 3 and 4), the risk for developing post-treatment high blood pressure (e.g., systolic > 180 or diastolic >100 mm Hg) combined with a significant increase from baseline (e.g., systolic > 30 or diastolic > 20 mm Hg) was higher for rasagiline (2%) compared to placebo (1%).
In Study 2 where rasagiline was given as an adjunct therapy in patients not taking concomitant levodopa, there were 5 reports of orthostatic hypotension in patients taking rasagiline 1 mg (3.1%) and 1 report in patients taking placebo (0.6%) [see Adverse Reactions ( 6.1 )] .
When used as an adjunct to levodopa, postural hypotension was also reported as an adverse reaction in approximately 6% of patients treated with rasagiline 0.5 mg, 9% of patients treated with rasagiline 1 mg and 3% of patients treated with placebo.
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Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.