What is the correct schedule for "bid" administration?

The term "bid" stands for "bis in die," which is Latin for "twice a day." This means that a medication should be administered two times within a 24-hour period. The specific times can vary based on the medication and the healthcare provider's instructions, but they are typically spaced out to allow for consistent levels of the drug in the system.

The schedule of 0900 and 2100 is a commonly accepted practice for bid administration. This allows for a comfortable 12-hour interval between doses, making it practical for patients to adhere to the regimen, especially if they have daily routines. The morning dosage at 0900 ensures the medication can be taken with breakfast, while the evening dosage at 2100 facilitates evening routines and bedtime schedules without disrupting sleep.

Other choices may suggest different intervals that may not align well with standard practices or could either result in doses being too far apart or too close to each other, thus potentially affecting the medication's effectiveness and patient compliance.