angina pectoris prophylaxis
"My GP suspected (and after pressure wire Angiogram) I was diagnosed with Variant (Prinzmetal) Angina. I have been taking Isosorbide Mononitrate 30mg successfully for a year. The headaches were awful at first but by "titrating" the (strictly once a day) dose (that is gradually increasing it to the prescribed strength over a period of a couple of months) the side effects were minimised. My GP was helpful in this regard by selecting tablets that could be halved; quartered; and of lower strength than the target dose, while working up to the full dose. The frequency episodes of chest pain have reduced from almost daily to about 1 day in 10 and the intensity of pain reduced from excruciating to quite mild."