Hyperventilation, cigarette smoking cocaine use and withdrawal and alcohol withdrawal are known to precipitate coronary spasm. Potential side effects of calcium channel blockers are constipation, swelling in the legs and in some persons severe swelling in the mouth and throat. Nitroglycerin may cause headaches and could reduce blood pressure to the point that nausea and vomiting occurs. Also important to treatment is risk factor modification such as cholesterol reduction, weight loss, quiting smoking and increasing exercise. Hope this information helps.
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