What is necessary for a possession charge of a controlled substance?

For a possession charge of a controlled substance, it is necessary to establish that the individual had possession of the substance without lawful reason, which aligns with the rationale behind option B. This component, often cited in criminal law, emphasizes that an individual can be charged simply for having a controlled substance if it is done unlawfully. This encompasses situations where the individual does not have a legal prescription or any other legal justification for possessing the substance, making it clear that mere possession can constitute a criminal act.

Possession without lawful reason is a critical element in most jurisdictions for prosecuting someone for illegal possession of controlled substances. The prosecution typically needs to demonstrate that the individual had knowledge of the substance and that it was present in their control, coupled with the absence of legal permission to possess that substance.

The other options revolve around specific circumstances or conditions that do not meet the general standard needed for a basic possession charge. For example, possession with intent to distribute specifies an additional intent beyond mere possession, while purchasing from a pharmacy or having a prescription implies legality and thus does not constitute illegal possession.