i DO HAVE SHORTNESS OF BREATH WHEN EXERCISING OR WALKING. iN FACT MY WALKING IS GETTING SLOWER AND SLOWER. I was just into see my Dr. He took me off of all my Presc. Medications for one month. I just checked my flow chart that I had from last year at home and noticed my CO2 levels was 34. Should I be concern about that level. The range level according to my chart is 21-30 mmol/L. After checking to see what Co2 PH levels was it also stated that it could be from medicine that has Bi carbonate in. The ones I have been taking are Primidone 50mg.one qd Simvastatin 20mg. one qd. Tramadol HCL 50 mg.1tab q6h prn. I also take a women vitamin with D and 2 -600 mg. Calcium along with a B3 and Vitamin B6. One more Osteo Bi-Flex Triple Strength Joint CAre 2 tab qd. Do you know if Bicarbonate is in any of these. I am still taking all the vitamins and Osteo Bi-Flex.