A multi chamber injection device includes multiple syringes. The multiple syringes may be arrayed in a circular linear or other format. In some implementations a needle port or similar may be shared by all the syringes in configuration that allows only one syringe to deliver contents at a time while blocking the other syringes from delivering their respective contents. In some implementations the syringes may be all stored in the same container. One or more of the chambers of a multi chamber injection device may be preloaded with medication. Different medications may be loaded into different chambers. The medications may be selected to treat the same medical condition.