How long does it take to find out if your allergic to digestive enzyme supplements?

The time frame for the development of an allergic reaction to any substance is highly variable and can be within days,weeks,months or years of taking the substance. I have seen allergic reactions the first day a person has taken a new medication presumably from a cross reaction to another medication taken in the past.Last one was after taking the first dose of the antiCovid medication, Paxlovid