Maybe he could prescribe you a sustained released nitro medication. There are several. That might help. Then you get a small dose released throughtout the day.
There are also skin patches that worked better for me (no headache) vs the pills
Calcium Channel Blockers (CCBs) are prescribed for ca spasms.
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Coronary artery spasm is recognized as a cause of ischemic heart disease, producing a syndrome of the variant form of angina that occurs at rest. Spasm also may play a role in other types of rest angina (unstable angina) and exertional angina.
Calcium is essential for the basic tonus of vascular smooth muscle. The accentuated contraction that occurs in coronary artery spasm is the result of an increase in intracellular calcium ions
Current therapy is aimed at blocking the slow calcium currents that are responsible for electrical activation and contraction of smooth muscle cells. A marked coronary vasodilatation is produced with calcium channel blockers, thus demonstrating effective therapy for coronary artery spasm.
A similar effect is achieved by nitrates, and these agents will continue to have a role in the therapy of spasm. Calcium channel blockers produce beneficial effects on myocardial oxygen supply and demand and, therefore, are also useful in the prevention of classic exertional angina caused by fixed obstruction. Verapamil and diltiazem possess electrophysiologic effects and have, in addition, proved useful in the treatment of supraventricular dysrhythmias.
I forgot to mention that I was on Isosorbide mononitrate for 2 years at 30 mg/day. I stopped it to try medicine for ED...
I am trying to start back but the headaches and other aches are a killer. I decided to wait until after surgery. Believe it or not, at 30 mg/day the headaches went away after about a month. There is a good headache medicine called Topamax that is for migraines.
Also some doctors don't like CCBs due to side effects like swelling ankles......