It increases the synthesis of dopamine, the release of dopamine and prevents dopamine re-uptake.
MAO B Inhibitors prevent the metabolism of dopamine by MAO B. Amantadine and istradefyllin are Adenosine A2A antagonist and prevent adenosine from metabolising dopamine. COMT inhibitors prevent COMT from converting levodopa to 3-O-methyldopa.
Bromocriptine is a dopamine agonist and pramipexole and ropinirole are not.
Bromocriptine and ropinirole are dopamine 2 agonists and pramipexole is a dopamine 3 agonist.
Pramipexole and Rasagiline. Pramipexole acts as a scavenger for hydrogen peroxide and Rasagiline prevents MPTP-mediated Parkinson’s.
They have neuroprotective effects and they decrease disease progression.
COMT inhibitors act by preventing the conversion of levodopa to 3-O-Methyldopa. They decrease fluctuations, improve response and prolong on-times.
Istradefyllin acts by antagonizing denosine A2A.
Safinamide is a MAO B inhibitor that increases dopamine levels by preventing re-uptake and also decreases glutamate release.