One of Ali Ashgar Laal's former patients, who was not named in college documents, told The College of Pharmacists of B.C. that in 2007 Laal took her out for drinks, and later back to the pharmacy.
She claims he injected her with what he told her was Demerol, but which she later believed to be the date-rape drug Rohypnol.
She said there were lapses in her memory after that point, but she described in detail the parts of the evening that eventually came back to her.
The college said it did not see evidence to prove there were sexual relations between the two, but it did say there was enough evidence to show the personal relationship was inappropriate.
Another of Laal's former patients, who was also not named by the college, said she entered a consensual relationship with Laal.
The college found she was in a vulnerable position at the time, and Laal abused his position as a pharmacist.
In 2009, during a search of one of Laal's pharmacies, a college inspector found a loaded handgun under the middle cushion of a couch in the back room.
According to information reported to the college by police, Laal did not have a permit for the gun and had been involved in another incident that resulted in a prohibition against possessing firearms.
In its written decision on a 2011 citation, The College of Pharmacists of B.C. also faulted Laal for failing to notify it of pharmacy renovations, and for keeping outdated products in his active pharmacy inventory.
The College has not yet determined a penalty for the misconduct.