Zolpidem tablets

A zolpidem oral tablet, comprising:

• (a) an inner tablet core comprising zolpidem or a pharmaceutically acceptable salt thereof and a controlled release matrix;
• and
• (b) a compressed coating layer surrounding said inner tablet core, which comprises an effective amount of zolpidem or a pharmaceutically acceptable salt thereof and at least one pharmaceutically acceptable excipient;
• wherein said tablet meets at least one of the following criteria:
• (i) the mass of said coating layer is at least 2.5 times the mass of said tablet core;
• (ii) the mass of said coating layer is at least 2 times the mass of said tablet core and said coating layer contains at least 30% of a binder;
• or
• (iii) the mass of said coating layer is at least 1.8 times the mass of said tablet core and said coating layer contains at least 34% of a binder.