Final answer:
Service members should deploy with a 90-day supply of prescription medications to ensure they have uninterrupted treatment for the duration of their deployment.
Step-by-step explanation:
When service members deploy, they should have a 90-day supply of prescription medications on hand. This ensures uninterrupted treatment and care during their deployment, where access to medical facilities and resources can be limited or uncertain. It is a part of their overall medical readiness that encompasses having adequate supplies of prescription drugs and medical supplies. Keeping a sufficient supply is necessary not only for the well-being of the service member but also for maintaining the operability and effectiveness of the deployed unit.