what is prodromal or is that spelt correctly
Thats the stage before psychosis where someone withdraws socially and begins to have minor positive symptoms. You’re on the internet and you posted this question so you might as well do a google search.
You can get diagnosed mistakenly with depression during that phase.
It’s spelled prodromal 
We could Google search almost everything that’s on this forum but then we wouldn’t need the forum at all.
Maybe he needs to hear a personalized experiences and maybe he is here to get answers…I find your comment a bit rude.
I have always thought it is a strange word so I followed the posters suggestion and “wikipediaed” it. You can be prodromal in other medical conditions (not just schizophrenia). It is the onset of early symptoms and the word is derived from the Greek word “prodromos” meaning precursor.