Abstract: A compact wearable modular multifunctional inhalation device of the present invention. In the illustrative embodiment, the device includes a housing with at least one port; a removable cartridge module adapted to seat within the housing, the cartridge including: a source of inhalant mounted within the cartridge for providing inhalant into the port and a heating element mounted within the cartridge for heating the inhalant; a removable modular electronic circuit adapted to seat within the housing to provide electrical current to the heating element; and a mechanism coupled to the housing for wearing the device. The electronic circuit may include a processor and memory. A removable modular electronic display is adapted to seat within the housing and connect electrically with the circuit. Software is stored in the memory for execution by the processor for activating the heating element. The software includes code for monitoring the status of the inhalant and/or the source of electrical potential.