Anemia, Dexilant, B12....Oh my!

[1KJCRUSADE]

This is for my mom not for me. About two months ago my mom started having fatigue, heart palpitations, headache, shortness of breath. The only medication she started around that time was Dexilant 60mg. There is no history of heart problems but there are digestive issues. In april she had some bloodwork done and then again this month. We are thinking that she has symptoms of anemia but the doctors are saying its nothing too serious. Could the symptoms be caused by Dexilant? If so, how long until the Dexilant is out of her system (I mean if she would go off of it.) Also, is this bloodwork indicative of Iron deficiency anemia? B12? or what is anyone's thoughts based on the bloodwork.

I will be writing two numbers the first one is the blood work from April, the second is the recent bloodwork.

RBC:  4.29      3.88
Hemoglobin: 12.4         11.4
Hematocrit:   39.3%        35.4%
Platelet:         227            221
Ferritin:                            55 (no ferritn levels or iron levels were checked in April only this month, June)
Iron:                                 95
TIBC                                374
% Saturation                    25.4

B12              384               645 (she did take B12 supplements..thinking it could be the cause, no difference)

Any thoughts would be greatly appreciated. They want her to see a cardiologist, which is fine, but we kind of doubt it that. It's interesting she started these symptoms when going on the Dexilant (however; she did go off of them for 3 days, no symptoms relief. She went back on them because it helps with GERD). Did she not give the Dexilant time to get out of her system? Could the Dexilant have cause vitamin deficiencies that quickly? She was also on a strict diet...so again, does the blood work indicate iron or maybe nutritional deficiencies?