Chemical degradation, for a variety of reasons, is favored by elevated temperatures. In the event your suspension is difficult to resuspend, consider an oversized bottle, especially if you have a viscous product. The first step is choosing a delivery dose. Next is the choice of vehicle. This vehicle should be sweetened and flavored, ranges of use for syrups are listed above.
Powders can be hard to wet.
The contents of a Docusate Na capsule or a few drops of Tween 80 often greatly help the initial wetting step. This keeps the shear value high. With mixing, gradually add your vehicle. Specific questions can be addressed to Paddock Laboratories. We'll be glad to offer our suggestions.