变性血红素 meaning in English

hemiglobin
metahemoglobin

Nitrites are used in treatment of coronary heart disease to dilate blood vessels . the side - effects are many , especially if the drug is used inappropriately , and include dizziness , nausea , vomiting , flushing of face and neck , palpitation and hypotension
它的副作用包括晕眩、作呕、呕吐、面部及颈部充血泛红、心悸及低血压，过量更可引致抑压呼吸效果和变性血红素贫血症，损害血液带氧的功能。