well Hans, it does state "The inevitable short hospital and prison stays would keep him off the music scene intermittently," and so the drugs and the recording may indeed "have to do" with each other. Nevertheless, there are little facts about his drug related problems (prison, hospital, when? how long?)
DAVID H. ROSENTHAL (Hard Bop, Oxford University Press, 1992 link) seems to want to point out that the jail and hospital bouts were part of the post BN era as he only mentions them in his last paragraph:
By 1962, Brooks' career as a recording artist was over. Nonetheless, he continued to appear at Bronx jazz spots like the Blue Morocco, Freddie's Bar, and the 845 Club with Hope, Beener, and others. Heroin addiction--complete with spells in jail and in hospitals--limited his professional activity during the rest of his life. The official cause of his death in 1974 was kidney failure. He had been too ill to play for several years.
No mention of large drug related problems during his recording years (1958-1961). My guess is the lack of success put the guy down and that somewhat dissilusioned he turned to second rate clubs and R&B bands to earn a living.
When and how long was he in that Connection play?