Why not, as long as the chemist or organization accept for the use, there's nothing bad in using it for making payments, as long as we are in need of an alternative means of making payments, it does not have to include a specific thing or category of what we are using bitcoin for, it's serves a medium of payment and can be used by anyone, but as just in your own case here, we don't know whether you're only buying a single piece from a retail shop or making purchase in large quantity for wholesale purpose, because of the transaction fee not being equal or more than the item you're going for.