the first visit went fine. my last visit not to well. besides copd i also have PAH. I was always at 5 liters 24/7 he told me i only needed 3L. I gasp for air all the time so I put myself back on 5L. Also I have anxiety and was on ativan as needed maybe 3x a week not everyday. He gave me a script the first visit which lasted me 3 months. and when I asked for a refill said flat out "no". I cannot figure out his reasoning for lowering my liter intake to 3L when for 2 yrs I was on 5L. His answer was I do not need it that high. Any input would be good. I am now looking for a new dr.