Oral Thiazides and Diuretics, Drug Exposure

This medication concept includes RxNorm codes for the ingredients hydrochlorothiazide, chlorothiazide and chlorthalidone and all of their descendants. It was developed by taking the RxNorm descendants of 974166 (hydrochlorothiazide), 992590 (chlorothiazide), and 1395058 (chlorthalidone) and excluding the search terms "cream", "ointment", "buccal", "topical". There was an additional string match for hydrochlorothiazide, chlorothiazide, chlorthalidone. This concept set was intended to investigate medication usage of patients with primary hyperoxaluria (PH) before and after diagnosis of PH, specifically for management of kidney stones. It was intended to contain non-topical formulations of hydrochlorothiazide, chlorothiazide, chlorthalidone. This medication concept set is limited to RxNorm and RxNorm Extension vocabularies and excludes topical medications.