Nifedipine
Nifedipine , sold under the brand name Adalat among others , is a calcium channel blocker medication used to manage angina , high blood pressure , Raynaud's phenomenon , and premature labor . 
<triplet> Nifedipine <subj> calcium channel blocker <obj> subject has role <subj> angina <obj> medical condition treated <subj> high blood pressure <obj> medical condition treated <triplet> angina <subj> Nifedipine <obj> drug used for treatment <triplet> high blood pressure <subj> Nifedipine <obj> drug used for treatment