Amantadine is a NMDA-antagonist that has anti-dyskinetic effects.
MOA-B inhibitors inhibits the MOA-B enzyme that metabolizes DA this increases the dopamine stores in neurons and inhibits the uptake of dopamine in the neurons.
Ergot derivative: bromocriptine. Non-ergot derivatives: ropinirole, pramipexole and apomorphine.
Pramipexole: direct agonist at D3 receptors. Ropinirole: agonist on D2 receptors. Bromocriptine: partial agonist on D2 receptors. Apomorphine: Activates D2-receptors and to a lesser extent D1-receptors.
Rasagiline and selegiline are neuroprotective drugs.
MOA-B inhibitors inhibit the MOA-B enzyme that metabolizes DA, increasing the dopamine stores in neurons and inhibits the uptake of dopamine in the neurons.
COMT-inhibitors inhibit the COMT-enzyme that converts L-dopa to 3-O-methyl dopa. 3-O-methyl dopa produces a weak therapeutic response with L-dopa because it competes with L-dopa for the active transport process. Thus, COMT-inhibitors will decrease the metabolism of L-dopa and increases its duration of action.
Istradefyllin is an Adenosine A2a-antagonist. The antagonist interferes with GABA releasing and controls ACh and DA release and will also facilitate DA receptor signaling.
Safinamide is used to increase DA activity as it is a potent antagonist of MAO-B. It also inhibits DA uptake in the neurons and decreases glutamate release. It is reversible.