The present invention, in one embodiment, is a gripping apparatus to ergonomically grip a self-injectable device (such as, for example, an insulin pen) to thereby provide a users fingers with a gripping means on the self-injectable device so that the combination of the apparatus with the self-injectable device facilitates one-handed operation on various parts of the human body and comprises a complete operational self-injectable assembly. The apparatus is adapted to snap-fit the body of a self-injectable device (e.g., an insulin pen) by inserting the self-injectable device longitudinally through the flange apertures of the apparatus, and twisting the apparatus around the devices body until the apparatus is in snug engagement with the device. The apparatus assists the user in using the self-injecting device for injection on any portion of the human body.