Washout and Rescue Protocols in April 2026 IOP-Lowering Studies
Beta-blockers (e.g. timolol): These are typically washed out by stopping the drop for 4 weeks. Research showed that a 2-week break is usually too...
Washout Period
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washout period
A washout period is a planned break from a medicine to allow its effects to leave the body. The purpose is to reach a baseline state so doctors or researchers can see how the body behaves without the drug’s influence. How long a washout lasts depends on the medicine’s half-life and how long its effects persist; it might be hours, days, or even weeks. These pauses are used when switching treatments, before certain medical tests, or in studies to avoid lingering effects from prior drugs. Because stopping a medicine can let symptoms return or get worse, washout periods are usually supervised by a clinician. Clinicians may provide temporary or alternative treatments to manage symptoms during the break. Medical teams weigh the need for clean measurements against the risks of stopping therapy for a particular person. Clear instructions about when to pause and when to restart treatment help keep people safe and keep results reliable. Knowing what a washout period is helps patients understand why their medication plan might include a temporary pause and what to expect during that time.