Abstract: The invention relates to the use of derivatives of F-type prostaglandins as ocular hypotensives. The PGF derivatives used in accordance with the invention are represented by the following formula I: wherein wavy line attachments indicate either the alpha (&agr;) or beta (&bgr;) configuration; dashed bonds represent a double bond, or a single bond, R is a substituted heteroaryl radical, R1 is hydrogen or a lower alkyl radical having up to six carbon atoms, X is selected from the group consisting of —OR1 and —N(R1)2, Y is ═O or represents 2 hydrogen radicals. Certain of the compounds represented by Formula I comprise another aspect of the present invention.

Abstract: Retinoid compounds which act specifically or selectively on RAR.sub..alpha. receptor subtypes in preference over RAR.sub..beta. and RAR.sub..gamma. receptor subtypes, posses desirable pharmaceutical properties associated with retinoids, and are particularly suitable for treatment of tumors, such as acute monocytic leukemia, cervical carcinoma, myeloma, ovarian carcinomas and head and neck carcinomas, without having one or more undesirable side effects of retinoids, such as inducement of weight loss, mucocutaneous toxicity, skin irritation and teratogenecity.