Sodium Calcium Chloride is a chemical impossibility. Sodium and calcium are both metals, chlorine is a nonmetal. Just the word "chloride" without "mono" or "di" would indicate an ionic bond. These are formed with metals and nonmetals, however only one metal can bond with one nonmetal. Sodium Calcium Chloride (which would be NaCaCl3 if it was real) has two metals in it, and therefore is an impossible composition.
According to Max, CONTROL can prosecute Jarvis Pimm for practising medicine without a license because he prescribed aspirin for their headaches. Anyone may recommend non-prescription medication to another person, and such recommendations are a recognised part of a pharmacist's duties.
Right at the beginning, as Max walks out of the bedroom, you can see the shadow of the camera and camera operator on the bottom of the door and on the floor.