Is the formula of quinine sulfate with acetylsalicylic acid in gelules possible or is there an incompatibility?

The following data can be found in documentation from my student's time.

"A mixture of quinine and acetylsalicylic acid, not kept dry becomes a sticky pink mass. If one takes the corresponding amount of quinine hydrochloride then the phenomenon is much less strong; With quinine sulfate, the powder mixture remains uncoloured, but is slightly damp. "

so maybe best opt for quinine. HCL and in a custom packaging with dry stop. Also no too large quantities.