Potassium is the fastest, safest, cheapest way to rid yourself of chest pain. If heart pain meds are not helping and you have lupus, chances are you have pleurisy. Pleurisy does not always show up on the X-rays they use to diagnose. If you can't get anything else to work, give potassium pills a shot. They are over the counter and if you follow the directions on the label, the pain may be relieved in as little as two days or less. Potassium is something that your body makes as well as uses what you ingest through foods (i.e. potatoes) When you drink pop, or take blood pressure medicines, potassium is leached out, and allows water to collect around lungs and heart causing searing pain that can be bad enough that you can't bear to breathe, moving from your sternum to your spine and encompassing what feels like your entire ribcage. If all else fails, give it a shot and see what happens. It won't hurt you, but it might help you.