For progestin-only injectables, the group considered only counseling essential and mandatory for safe use of the method. If one progestin-only injectable is out of stock, some providers switch women to another injectable. There is little information on the effects of such switching. In the only published study of women receiving two different injectables, Thai women who had received two injections of DMPA 12 weeks apart switched to NET EN every 12 weeks to reduce bleeding problems. Providers should tell women if they switch injectables.
Clients have a right to know.
Also, they may notice a difference in side effects or become confused when providers change the injection schedule for no apparent reason.