A wearable device for monitoring the body parameters of an individual and for delivering a drug and/or therapeutic agent. The device comprises a processing unit and a drug delivery unit. The processing unit comprises a sensor to determine body parameters of a user； a reservoir to store the drug； a processor to receive signals indicative of the body parameters from the sensor and determine a quantity of the drug to be delivered from the reservoir based on the body parameters； and a signal generator to generate electrical signals based on control instructions received from the processor. The drug delivery unit comprises a chamber to receive the determined quantity of the drug from the reservoir and a transducer connected to the chamber, wherein the transducer transdermally delivers the drug from the chamber to skin based on an electrical signal received from the signal generator.
