Hi! @juanito may I also add, if you have a concern with your oxygen level you may use a pulse oximeter to monitor the percentage of oxygen in your body. Normal is about 95%. A pulse oximeter can be purchased for around $50. Prices vary. Also your doctor may order a 24 hr test to determine if supplemental oxygen is needed. Usually, oxygen levels in the 80s may be the reason for confusion. You will need a strong diagnosis to support the test and supplemental oxygen for coverage by your health insurance. I have neuropathy and do notice a shortage of breath because I have a sensitivity to heat. Taking deep long breaths more often helps me to cool down to be more comfortable. I do not have a respiratory deficit. I did use the pulse-ox meter. My oxygen levels were 95% or above. Wish you well. Toni