SteelMaster Heavy-Duty Locking Box

* Price subject to change
 

This model fromSteelMaster is made from durable steel and is constructed with double insulation to help make it fire resistant. It is fire retardant to 750 degrees for 15-20 minutes. This box secures with a key latch. So the trick would be to have the key in a safe place that can't be easily found. 

• Frame Material: Steel
• Lock Type: Key Lock
• Dimensions: 9.300 H x 12.750 W x 4.250 D
• Exterior Dimensions: 9.300 H x 12.750 W x 4.250 D
• Interior Dimensions: 4.000 H x 12.750 W x 8.250 D
  

 
I would consider this an entry level box as well. As mentioned with it using a key to lock the box you would need to be able to secure or hide the key. But this can still be a viable option for a medication lock box, especially if you are just trying to keep medication out of the hands of little children.