as of or pertaining to opiates??

Is opiatic a word? What the adjective that I am looking for? I looked it up on dictionary.com and couldn’t find anything close for opiate, opium or opiod. Any help? Thanks!

Opiate is the word–the adjective meaning “of or pertaining to opium.”

Opiate has also become a noun to refer to the class of opium derived substances, but the adjective remains opiate, as well.

There is a word opioid, but has the specific meanings (according to Merriam-Webster