US Patent 11833333 Drug tracking device

A drug tracking device used in combination with a drug injection device. The drug tracking device may comprise a housing configured to engage with the drug injection device, an optical sensor configured to capture an image of a portion of the drug injection device. The portion of the drug injection device displays indicia of drug doses, such that a captured image includes at least one indicia of a drug dose. The drug tracking device may include a memory module having pre-stored indicia of drug doses, and a processor having instructions operating thereon configured to cause the processor to determine an injected drug dose by comparing at least one indicia of the drug dose in the captured image with the pre-stored indicia of drug doses.