dihydralazine dihydralazine dihydralazine is a prescription drug with antihypertensive properties. it functions by combating the effects of adrenaline, and by expanding the blood vessels so as to enable smoother flow of blood by decreasing the pressure. it is generally administered orally, and is available in the form of tablets. it belongs to the hydrazinophthalazine chemical class. it has very similar effects to hydralazine. dihydralazineclinical dataahfs/drugs.cominternational drug namesatc codec02db01 (who) identifiers iupac name 4-hydrazinyl-1-hydrazinylidene-1,2-dihydrophthalazine cas number484-23-1 npubchem cid10230chemspider9813 yuniipcu411f5l6keggd07170 ychemblchembl35505 ycomptox dashboard (epa)dtxsid0022935 echa infocard100.006.914 chemical and physical dataformulac8h10n6molar mass190.210 g·mol−13d model (jsmol)interactive image smiles nnc1c2ccccc2c(=nn)nn1 inchi inchi=1s/c8h10n6/c9-11-7-5-3-1-2-4-6(5)8(12-10)14-13-7/h1-4h,9-10h2,(h,11,13)(h,12,14) ykey:vqklrvzqqyvijw-uhfffaoysa-n y ny (what is this?) (verify) side effects headache loss of appetite nausea vomiting diarrhea palpitations increased heart rate angina pectoris contraindications contraindications to this drug include allergic reactions to this drug or to any of its components, ischemic heart diseases, coronary artery diseases, valvular stenosis, aortic aneurysms and pericarditis. patients who have a previous medical history of kidney dysfunctions, liver damage, heart disorders and cerebro-vascular disorders must exercise caution while taking this medicine. dihydralazine must not be prescribed to patients who are elderly, and to breastfeeding women. caution must be exercised while prescribing this medicine to pregnant women. other important information on intake when ending intake, you are recommended to withdraw gradually from this medicine, as opposed to abruptly ceasing its intake. heartbeat problems and edema may occur as adverse effects.