since quantitative angiography done in a similar group of patients showed that intracoronary nitroglycerin , 200 micrograms , was a more potent vasodilator than sublingual nifedipine , 10 mg ( p less than 0.01 ) , the calcium antagonists may have a different mechanism of preventing variant angina attacks and may act in an additive or synergistic fashion when administered in combination with long-acting nitrates .
C0017887
nitroglycerin
C0028125
nitrates