At 25:11 Danny puts his phone on the bar with his left hand. The next shot he is holding the phone in his right hand.
For potassium chloride to be lethal taken orally or intra-nasally, far larger doses than fitting in the stamp bag shown, or could be snorted in one setting, would be required. Sudden death like depicted only occurs when injected. It also does not exacerbate respiratory depression caused by heroin.
The disturbance call goes out as 1345 West End Avenue with no apartment number. Upon arrival, Jamie and Sgt. Renzulli are on the 13th floor (the elevator label is visible) outside Apartment 1301. When Sgt. Renzulli calls for EMS, he gives the same address without the apartment number.