https://www.amazon.com/Magic-Bullets-Medicine-Keith-Jahans-ebook/dp/B07F72FNFM
The quest for a magic bullet is to find a drug which can cure disease and do no harm. Microbiologist Adam Knight finds that the new antibiotic, Floracillin, he has extracted from a mushroom can cause cancer. The mushroom can make someone hallucinate when ingested and think it is magical. He falls in love with a young talented singer, the daughter of the head of a pharmaceutical company who wants to acquire the commercial rights to Floracillin. But he becomes involved with other bullets that come from Kalashnikov automatic rifles and into contact with dangerous and sinister people who threaten the survival of the girl he loves.