Three rules of thumb.
Newcomb
R D
RD
D000287:Administration, Topical; D000319:Adrenergic beta-Antagonists; D000893:Anti-Inflammatory Agents; D002257:Carbonic Anhydrase Inhibitors; D000075202:Contraindications; D011307:Drug Prescriptions; D005938:Glucocorticoids; D006801:Humans; D007880:Legislation, Drug; D009907:Optometry / Q000331:legislation & jurisprudence*; D014903:West Virginia
D000319:Adrenergic beta-Antagonists; D000893:Anti-Inflammatory Agents; D002257:Carbonic Anhydrase Inhibitors; D005938:Glucocorticoids