No tablets are left in the pack.
There are no tablets in the pack.
There are no more tablets in the pack.
There are no tablets left in the pack.
There are no more tablets left in the pack.
The pack contains no tablets.
The pack contains no more tablets.
The pack is empty.
______________
No tablets have left the pack is not idiomatic, and it means the reverse of the expressions I wrote above. It means:
All the tablets are still in the pack.
CJ