Old-old-old show-biz “hokum” genre. Doctor Good = the 'quack' or charlatan. Cher's first #1 single:

“I was born in the wagon of a travellin' show
My Mama used to dance for the money they'd throw
Papa would do whatever he could
Preach a little gospel
Sell a couple bottles of Doctor Good.”
[Gypsys, Tramps & Thieves, Bob Stone, 1970]