93 Year Old Neighbor Lady Wants To Know Which Is

93 year old neighbor lady wants to know which is safer to use, the albuterol nebulizer or the ipratropium/albuterol sulfate, since she can't recall which she used at 2:30...doc said her albutrol nbulizer can be used 4-6 times per day while the ipratropium/albuterol sulfate should be used 4 times per day. Her last treatment was at 2:30 but she doesn't remember which treatment she had since her visitor moved her vials and messed up her system! She has been doing them 4 hours a day but takes one, then the other 2 hours later. She is due again at 4:30! Help!
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