<prompt> All of the following are side effects of Quinine except:QT prolongationTinnitusTeratogenicityHypoglycemia  <response>: Quinine blocks K channels and can lead to QT prolongation.It can also increase Insulin secretion and causes hypoglycemia.It is a Cinchona compound that can lead to tinnitus and vertigo.It is not teratogenic and hence can be used in pregnancy. 