Yes, but for HTN
In other words, if you have pd & htn, why not use it? Isradipine is a calcium-channel blocker used to treat hypertension.
But, it was found in dopamine-producing neuron
cell cultures to help extend survival of the neurons by reducing calcium influx--a sinister, universal late stage process during programmed cell death (apoptosis) in parkinson's disease
& other neurodegenerative disorders.