Published in Glaucoma

Here’s the Washout Period for Each Glaucoma Medication

This is editorially independent content
5 min read

For your convenience and patient education, we've compiled the washout periods for a range of glaucoma medications.

Here’s the Washout Period for Each Glaucoma Medication
Sometimes a clinician will need to discontinue a patient’s glaucoma medications just long enough to get a baseline IOP, and then build a fresh plan for IOP control. But how long after discontinuing glaucoma medication does the IOP confidently reach baseline levels?
The answer is a confusing smear of a bell curve, different for every patient depending on their kidney and liver function, concurrent systemic medications, and type of glaucoma. We reviewed dozens of peer-reviewed journals and FDA approval reports to bring you an easy-to-use simplified clinical washout period for each glaucoma medication. If you would like to delve deeper into the complicated world of absorption and clearance rates, blood and plasma concentrations vs lingering clinical effects, standard deviations, chemical half-life, and confounding variables, our best source references are listed at the end of the article.

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Brand NameGeneric NameWashout Period
Lumigan 0.01%Bimatoprost soln4.5 weeks
Lumigan 0.03%Bimatoprost soln4.5 weeks
Travatan 0.004%Travoprost soln4.5 weeks
Travatan Z 0.004%Travoprost soln4.5 weeks
Zioptan 0.0015%Tafluprost soln4.5 weeks
Xalatan 0.005%Latanoprost4.5 weeks
Rescula 0.15%Unoprostone soln4 weeks
Vyzulta 0.024%Latanoprostene Bunod soln4.5 weeks


Brand NameGeneric NameWashout Period
Timoptic 0.25%Timolol soln4 weeks
Timoptic 0.5%Timolol soln4 weeks
Timoptic XE 0.25%Timolol Gel-Forming soln4 weeks
Timoptic XE 0.5%Timolol Gel-Forming soln4 weeks
Timoptic Ocudose PF 0.25%Timolol soln4 weeks
Timoptic Ocudose PF 0.5%Timolol soln4 weeks
Betoptic 0.5%Betaxolol soln4 weeks
Betoptic S 0.25%Betaxolol soln4 weeks
Betagan 0.25%Levobunolol soln4 weeks
Betagan 0.5%Levobunolol soln4 weeks
Optipranolol 0.3%Metipranolol soln4 weeks


Brand NameGeneric NameWashout Period
Alphagan 0.15%Brimonidine soln5 weeks
Alphagan P 0.15%Brimonidine soln5 weeks
Alphagan 0.2%Brimonidine soln5 weeks
Iopidine 0.5%Apraclonidine soln5 weeks
Iopidine 1%Apraclonidine soln5 weeks

Muscarinic Agonists

Brand NameGeneric NameWashout Period
Isopto Carpine 1%Pilocarpine soln3 days
Isopto Carpine 2%Pilocarpine soln3 days
Isopto Carpine 4%Pilocarpine soln3 days

Rho-Kinase Inhibitors

Brand NameGeneric NameWashout Period
Rhopressa 0.02%Netarsudil soln4 weeks

Carbonic Anhydrase Inhibitors

Brand NameGeneric NameWashout Period
Azopt 1%Brinzolamide susp1 week
Trusopt 2%Dorzolamide soln1 week
Trusopt PF 2%Dorzolamide soln1 week
Diamox Sequels 500mgAcetazolamide ER tablet1 week

Osmotic Diuretics

Brand NameGeneric NameWashout Period
Osmitrol 20%Mannitol soln (oral or IV)1 week


Brand NameGeneric NameWashout Period
THCTetrahydrocannabinol (THC)4 days
MarinolDronabinol (synthetic THC)4 days
  • Note: CBD (Cannabidiol) raises IOP even higher, so CBD does not treat glaucoma.

Fixed-Combination Medications

Brand NameGeneric NameWashout Period
CosoptTimolol + Dorzolamide soln4 weeks
Cosopt PFTimolol + Dorzolamide soln4 weeks
CombiganTimolol + Brimonidine soln5 weeks
SimbrinzaBrimonidine + Brinzolamide susp5 weeks
DuoTravTimolol + Travoprost4.5 weeks
XalacomTimolol + Latanoprost4.5 weeks
RocklatanNetarsudil + Latanoprost4.5 weeks
Occasionally, we need a glaucoma patient to discontinue all their IOP medications so we can measure a confident baseline and establish which medications are effective for them.
Educate the patient on the following:
  • They will still need to be treated with IOP medications afterward.
  • Even though a high IOP can cause vision loss long-term, the brief timeline of the washout period should not cause any vision loss.
  • During the washout period, if they experience any discomfort or change in vision they should return to the clinic immediately.
Navigating the washout period for ocular hypotensive medication in research can be very frustrating. Different authors will publish conflicting findings for the same medications. As a frontline clinician, you must decide how to use the data—will your washout time match when 50% of similar patients have returned to baseline, or 90%, or 99%? The difference can mean many weeks or months of your patient leaving their eye pressure untreated. Our published guidelines reflect a marriage between the cold, hard science of drug washout and the industry-accepted, standard-of-care timelines. However you choose to manage your patient’s washout, make sure that your confidence is evidence-based and your patient understands your long-term plan.


  1. Diaconita V, Quinn M, Jamal D, Dishan B, Malvankar-Mehta MS, Hutnik C. Washout Duration of Prostaglandin Analogues: A Systematic Review and Meta-analysis. J Ophthalmol. 2018 Sep 27;2018:3190684. doi: 10.1155/2018/3190684. PMID: 30363694; PMCID: PMC6180964.
  2. Leary KA, Lin KT, Steibel JP, Harman CD, Komáromy AM. Safety and efficacy of topically administered netarsudil (Rhopressa™) in normal and glaucomatous dogs with ADAMTS10-open-angle glaucoma (ADAMTS10-OAG). Vet Ophthalmol. 2021 Mar;24 Suppl 1(Suppl 1):75-86. doi: 10.1111/vop.12734. Epub 2019 Dec 24. PMID: 31872953; PMCID: PMC7755039.
  3. Stewart WC, Holmes KT, Johnson MA. Washout periods for brimonidine 0.2% and latanoprost 0.005%. Am J Ophthalmol. 2001 Jun;131(6):798-9. doi: 10.1016/s0002-9394(00)00930-2. PMID: 11384581.
  4. Diaconita V, Quinn M, Jamal D, Dishan B, Malvankar-Mehta MS, Hutnik C. Washout Duration of Prostaglandin Analogues: A Systematic Review and Meta-analysis. J Ophthalmol. 2018 Sep 27;2018:3190684. doi: 10.1155/2018/3190684. PMID: 30363694; PMCID: PMC6180964.
  5. Huestis MA. Human cannabinoid pharmacokinetics. Chem Biodivers. 2007;4(8):1770-1804. doi:10.1002/cbdv.200790152
  6. Weinreb, Robert N. et al. 24-Hour Intraocular Pressure Control with Fixed-dose Combination Brinzolamide 1%/Brimonidine 0.2%. Ophthalmology, Volume 126, Issue 8, 1095 - 1104.
  7. 21214 Rescula Medical Review Part 1 (US Food and Drug Administration).
  8. Konstas, A., Katsimpris, I., Kaltsos, K. et al. Twenty-four-hour efficacy of the brimonidine/timolol fixed combination versus therapy with the unfixed components. Eye 22, 1391–1397 (2008).
  9. Improved near visual acuity in presbyopes using carbachol and brimonidine eye drops. Trial registered on ANZCTR.
Bruce Colton, OD
About Bruce Colton, OD

Bruce Colton, O.D. earned his degrees from BYU and UHCO, where he taught Microbiology and did stem cell research with the NIH to help cure macular degeneration. He opened Bright Eyes Vision Clinic near Dallas, TX in 2017, which he now manages as a multi-doctor practice. He loves treating special needs children, home-bound seniors, and performing minor surgeries. He has done years of humanitarian work in Argentina, China, and Guatemala. In his free time, Dr. Colton plays with his four small children, sponsors people in addiction recovery, and takes his wife on romantic dates

Bruce Colton, OD
Sierra Vogt Suarez, OD
About Sierra Vogt Suarez, OD

Sierra Vogt Suarez, OD, earned her degrees at The University of Iowa and ICO. Due to her husband's career with the Air Force, Dr Suarez has worked in private practices in South Carolina, New Jersey, and Oklahoma. She most recently spent four years in rural Oklahoma as a mobile doctor, visiting senior citizens in nursing homes and at assisted living facilities to provide bedside medical care. She most enjoys treating young children with vision therapy to help them avoid eye surgery and improve their academic and sports performance. In her free time, Dr. Suarez spends time with her husband and two young children.

Sierra Vogt Suarez, OD
Iqra Quddus, OD
About Iqra Quddus, OD

Iqra Quddus, OD, earned her degrees at Stony Brook University in New York and UHCO. She graduated UHCO in May 2018 and has practiced in both NY and currently practices at Bright Eyes Vision Clinic in Murphy, TX. She most enjoys treating patients who are suffering from dry eyes and ocular disease, and fitting speciality contact lenses when traditional glasses and contacts are not adequate. She has also traveled to Haiti with VOSH to help the underserved with their eye care needs. In her free time, Dr. Quddus loves to spend time with her husband and travel around the world.

Iqra Quddus, OD
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