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ACS Applied Bio Materials

ACS Applied Bio Materials

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Intraocular and intracranial pressure in glaucoma patients taking acetazolamide.

Published:18 June 2020 DOI: 10.1371/journal.pone.0234690 PMID: 32555666
Allison R Loiselle, Emile de Kleine, Pim van Dijk, Nomdo M Jansonius

Abstract

The alternative mechanical theory of glaucoma, in which an increased pressure difference across the lamina cribrosa (difference between intraocular and intracranial pressure; IOP and ICP), rather than solely an elevated IOP, leads to structural and functional vision loss, is still controversial. If the theory is true, a drug that simultaneously lowers both the IOP and ICP may be ineffective. The aim of this study was to determine how acetazolamide (AAZ; a drug prescribed in glaucoma that aims to lower the IOP) affects both IOP and ICP in glaucoma patients and to compare the magnitude and time course of the induced pressure changes with those of healthy subjects not taking AAZ. IOP and noninvasive ICP (measured through emissions from the ear) were measured in 20 glaucoma patients taking 125 mg of AAZ twice daily. Measurements were taken for 30 minutes before taking the drug and for 2 hours post-ingestion. Comparisons were made with 13 age-similar controls. After 12 hours with no anti-glaucoma medication, AAZ did not further reduce IOP in glaucoma patients compared to controls (P = 0.58) but did reduce ICP compared to controls (P = 0.035), by approximately 4 mmHg. Our findings suggest that there are periods during the day when the pressure difference across the lamina cribrosa is larger in case of AAZ use. Future studies should focus on improving the noninvasive ICP testing, different doses and dosing schedules of AAZ, and the time course of IOP in glaucoma patients not taking AAZ.

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Related products
Procduct Name CAS Molecular Formula Supplier Price
Acetazolamide 59-66-5 C4H6N4O3S2 430 suppliers $11.00-$600.00
AAZ-A 154 benzoate 2930845-92-2 C14H20N2O.C7H6O2 1 suppliers Inquiry

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