When we had issues trying to get adeks drops -- constantly on back order -- we substituted regular baby vitamin drops until I could get an order from cf pharmacy. Anyhoo, the cf dietican indicated that poly-vi-sol was okay to use in the short term; however, ds really needed the adeks so he could get zinc, which the regular vitamins didn't have.
Is she on a regular cf vitamin such as aquadeks, source cf or vitamax. Those all have zinc in them...