What is the injection schedule for allergen immunotherapy?

Varies. Most practioners start with injections every 2 to 14 days initially and then once maintenance is achieved patients go to every 2 weeks and often every 4 weeks.
IT schedule. Immunotherapy is administered more frequently when starting, usually once or twice weekly, with the shots being spaced farther apart once levels get into a more stable maintenance range. Depending on how well the shots are tolerated, it usually takes 3 to 6 months to reach levels that are therapeutic. Once the dose is stabilized, the shots can be reduced to every 2 weeks or more.