Welcome to Mezera.ca A website designed to help you understand your treatment. Use the MEZERA® DIN to login and access useful tips, tools and resources. Where can I find the DIN?The DIN (Drug Identification Number) is the 8-digit number on the front of the MEZERA box. MEZERA Foam Enema You can also find it on your pharmacy receipt. Download this MEZERA discussion guide and speak to your doctor or pharmacist!