I think it is very case by case! I mean, I haven't worked with a nurse that has admitted to any disablities, or seemed to have one...so I haven't had the experience...
BUT, I have worked with my hubby's company on ride alongs (paramedic), and they have a paramedic who has narcolepsy..okay what a condition to have in an ambulance! LOL. But they have made changes to accomidate him, and he may have a spell once a year during work hours (he doesn't get to drive much..LOL!). He is a great paramedic with 20 years experience, so to fire him or let him go would be a loss to our community! Thank goodness we have a great ambulance company that appreciates the tallent and willing to work with most disablities (I mean, some you can't work with...a wc bound paramedic wouldn't work...or someone that has substantial physical limitations (and I am talking in ambulance work...office or education no probelm!!!

)..and I don't consider that discriminatory...just common sence towards realistic expectations for the job itself! It is a very physical job!!!).
Be honest with yourself and your own personal limitations...and don't go into something that will be too much for yourself...nursing can be hard enough on its own without putting other challenges into the mix

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Oh yeah...and me, I have to be very careful with numbers! I tend to reverse numbers when stressed...I deal with that by double checking everything I do in regards to numbers...even if it takes a while. And for emergency meds and such...those I practice till it is second nature...because I know I may have a limitation there, and practice may not mean perfect...but sure helps!