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The Anatomical Therapeutic Chemical (ATC) classification system
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Level 5
C - Cardiovascular systemC02 - AntihypertensivesC02L - Antihypertensives and diuretics in combinationC02LG - Hydrazinophthalazine derivatives and diureticsC02LG02 - Hydralazine and diuretics
Hydralazine and diuretics
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