Each troche is one dose. However, depending on what your doctor prescribes, you will either start with a half of a tab or a full one.
On the orange medication case, you'll also see the instructions and suggested dose prescribed by your doctor. If the physical instructions are no longer available, you can find them under "Prescription Details" in the Manage Prescription section of your account.
These are sublingual troches so they dissolve under your tongue.