Absorption of ocular timolol. 1980

G Alvan, and B Calissendorff, and P Seideman, and K Widmark, and G Widmark

The absorption of timolol after topical administration to the eye was studied in 11 healthy volunteers and in 5 patients with bilateral open angle glaucoma. The volunteers received 2 drops of 0.5% timolol ophthalmic solution in each eye, equivalent to 0.8 mg of timolol maleate. Overflow was absorbed by paper tissue. The patients received the same dose twice daily for 2 weeks and were then investigated. In the paper tissue, 12 to 88% of the dose administered was recovered. Plasma concentrations were never above 5 ng/ml and not always detectable (detection limit 1 to 2 ng/ml). However, timolol was absorbed as the drug was found in the urine samples from all volunteers and glaucomatous patients.

UI MeSH Term Description Entries
D007700 Kinetics The rate dynamics in chemical or physical systems.
D008297 Male Males
D009883 Ophthalmic Solutions Sterile solutions that are intended for instillation into the eye. It does not include solutions for cleaning eyeglasses or CONTACT LENS SOLUTIONS. Eye Drop,Eyedrop,Eyedrops,Ophthalmic Solution,Eye Drops,Drop, Eye,Drops, Eye,Solution, Ophthalmic,Solutions, Ophthalmic
D011412 Propanolamines AMINO ALCOHOLS containing the propanolamine (NH2CH2CHOHCH2) group and its derivatives. Aminopropanols
D005123 Eye The organ of sight constituting a pair of globular organs made up of a three-layered roughly spherical structure specialized for receiving and responding to light. Eyes
D005260 Female Females
D005901 Glaucoma An ocular disease, occurring in many forms, having as its primary characteristics an unstable or a sustained increase in the intraocular pressure which the eye cannot withstand without damage to its structure or impairment of its function. The consequences of the increased pressure may be manifested in a variety of symptoms, depending upon type and severity, such as excavation of the optic disk, hardness of the eyeball, corneal anesthesia, reduced visual acuity, seeing of colored halos around lights, disturbed dark adaptation, visual field defects, and headaches. (Dictionary of Visual Science, 4th ed) Glaucomas
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000042 Absorption The physical or physiological processes by which substances, tissue, cells, etc. take up or take in other substances or energy.
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults

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