Came across an article where it was mentioned it exists as a mixture of S and R enantiomers, see attached

Hi Adeyinka Aina , thanks for sending this paper. Not 100% sure but my understanding of what mentioned in that article is that only one polymorphic form of the compound exists ("One polymorphic form is consistently produced which has been declared not to change upon storage"). The fact that consists of a mixture of S and R enantiomers might be independent from its polymorphic form?

It all depends on how you define polymorphism, I stick to 'same chemical formula but different structural arrangement' in that vein you can say S and R (mirror images) are two types of form A? I have attached another article that talks extensively about the structural properties of fluoxetine HCl

I was considering polymorphism in terms of different crystalline forms. In that sense, it seems that only form A exists. Anyway, thanks for sending that, i'll have a look!

I've found some clues from your discussion....thank you, Mr. Antonio Salituro & Mr. Adeyinka Aina