The present invention provides an injection pen system comprising of a driver assembly for a drug container； a syringe assembly； a power source for generating electrical energy； electrical communication means in each of the driver assembly and syringe assembly wherein the driver assembly and syringe assembly are in electrical communication； and at least one microprocessor programmed to monitor electrical signals produced by the injection pen components. The electrical signals may be produced at predefined intervals and they may be wirelessly transmitted. The transmitted signals may trigger commands within a computer program monitoring the injection process. The computer program may be spaced from the injection and driver assemblies. The injection pen system may incorporate a two-way switch activated by a trigger initiated by pulling a cap from a primary drug container or pushing the drug container adjacent a subject. The activation may cause the mixing of a lyophilised substrate with a fluid for injection.
