Final answer:
Buspar may increase plasma levels of certain medications by inhibiting the enzyme CYP3A4, notably antidepressants, calcium channel blockers, and some statins. It is crucial to consult a healthcare provider before combining Buspar with other medications.
Step-by-step explanation:
The medication that's plasma levels are increased by Buspar is alprazolam. Buspar (buspirone) is an anxiolytic medication that is used to treat anxiety disorders. It works by affecting certain chemicals in the brain to help reduce anxiety. Buspar can increase the plasma levels of alprazolam, which is a medication that belongs to the class of benzodiazepines.
When Buspar is taken with alprazolam, it can inhibit the enzymes responsible for breaking down alprazolam, leading to increased levels of alprazolam in the body.