Yes, you can best store the microdoses in the refrigerator. Sealed (vacuum) they will remain useable for up to two months. Is there no space in the fridge? Then store the products in a cool, dry and dark place. You thereby limit the risk of rotten products or a reduction in psilocybin content.
The truffles that we use for the microdosing are fungi by definition. That means that you can best store the psilocybin at 2 to 4 degrees Celsius. Avoid ice formation and always leave the strips in their packaging. In this way there will not be much moisture with the microdos. Too much moisture could lead to infections on the truffles, so that they lose their operation and strength (partially).