The inherent instability of biological drugs is a limitation that has a direct impact on the drug delivery sector. Therapeutic proteins must either be stored under special conditions or formulated to retain their efficacy from the time of manufacture until they are dispensed. Liquid protein drugs require refrigeration until dispensed. Alternatively, proteins can be formulated as powders (lyophilization) and must be reconstituted prior to injection. Historically, this was accomplished by including a disposable syringe and diluent vial for manual reconstitution. As the number of drugs developed for self-administration has grown, devices that integrate a reconstitution step with the injection step have gained traction. As biological drugs continue to grow in terms of therapeutics and total prescriptions, the impact of specialty devices will increase.