<s>[INST] My dad has been c/o headache x4 days and a pain in his chest. I have been checking his b/p and it is stable at 98/74 daily. Today he went to the ER because he had numbness and tingling from his neck down the left side of his body. EKG and X-RAYS are all normal. The doc said that he is a little dehydrated so he is on IV fluids, but he doesn't feel any better. He was also given nitro S/L, but he said it didn't help and only made his headache worse(naturally). Any ideas of what this could be? [/INST] In a dehydrated patient the possibility of electrolytes imbalance is also there, so that may also be checked and corrected if derranged </s>