They look a little OFF. Very smooth around the edges, which is a sign of a fake. The snake & arrow emblem is a little faint as well.
Put a tab in your mouth and leave it there for a good 30 seconds. It SHOULD NOT DISSOLVE, almost at ALL.
If it dissolves in your mouth, it's fake.
Furthermore, you can CHEW the tablets. They should be SWEET, followed by a BITTER after-taste. The FAKE tabs are just SWEET, with no real aftertaste.