With kidney stones can it cause chest pain? also is it normal to have tarry or black stool with 800 mg ibuprofin?

No and No: Kidney stones cause colic, a typically abdominal and back phenomenon. Tarry stool and chest pain associated with Ibuprofen use signals trouble--e.g. Gi bleeding from injury to the upper GI tract. Immediately, stop Ibuprofen and start an acid blocker drug like Prilosec otc. Call your doctor, or if melena persists or you feel dizzy or weak then go to the er at once.

CP: 1. Kidney stones do not normally cause chest pain, it more of flank pain 2. Black tarry stools means you are bleeding in the gut. This is a medical emergency. You need to stop taking Ibuprofen immediately. 3. Go to er now.

Melena: 1. Kidney stones do not cause chest pain. 2. Black stool also called melena indicates you are probably from your GI tract. The fact that you have been taking Ibuprofen may increase your risk for peptic ulcer disease. I suggest you follow up with your provider as soon as possible or go to an urgent care/er.