Hello, @Seller_ROqyKxSuGDnPn,

Thank you for raising this topic to the Forums. This is Sunnie, from Amazon.

Our forums are a safe space to ask and share knowledge regarding Amazon selling platform, however, to help you with your question, I found this information on the internet:

NPN and DIN are codes used to identify drugs and medications in different countries. NPN stands for Natural Product Number, which is assigned by Health Canada for natural health products sold in Canada. DIN stands for Drug Identification Number, which is assigned by Health Canada for pharmaceutical drugs sold in Canada.

To obtain an NPN or DIN, you need to apply to Health Canada's Natural and Non-prescription Health Products Directorate (NNHPD) or the Therapeutic Products Directorate (TPD), respectively. Here are the details:

For obtaining an NPN (Natural Product Number): You need to apply to the Natural and Non-prescription Health Products Directorate (NNHPD) of Health Canada. The NNHPD is responsible for regulating natural health products, including vitamins, minerals, herbal remedies, homeopathic medicines, and traditional medicines.

You can find more information and application forms on the Health Canada website here.

For obtaining a DIN (Drug Identification Number): You need to apply to the Therapeutic Products Directorate (TPD) of Health Canada. The TPD is responsible for regulating prescription and non-prescription pharmaceutical drugs.

You can find more information and application forms on the Health Canada website here.

I hope this helps. If you require any additional information, please reach out to the NNHPD or the TPD.

-Sunnie