A drug delivery device comprises first and second liquid drug reservoirs and first and second outlet ports. A drive is configured for expelling a first liquid drug from the first reservoir to the first outlet port and for expelling a second liquid drug from the second reservoir to the second outlet port. A memory is provided that contains a drug dosing scheme specifying a desired liquid drug type, and at least one sensor is provided that detects information concerning the type of liquid drug contained in the first and/or second reservoir. A processor receives the information from the at least one sensor and thereby determines the type of liquid drug retained in the first reservoir and/or the second reservoir, and uses the drug dosing scheme and the determined type of liquid drug to operate the drive. Associated devices this disclosure and methods are also disclosed.
