Board Thread:Questions and Answers/@comment-3429794-20131225032550/@comment-6335668-20131227012835

Poppies are expressly referenced for use as pain-relief in Cycle of Hatred, as an addictive substance. There's no need to reach for analogues or to justify by 'there are many poppies ingame' - in lore, hoople-heads already exist. All your opiates, your proper opiates, will derive from only from the opium poppy. Other poppies generally don't contain that delicious opium.

That being said, Drakkari water-poppies can be used as a painkiller. The opium-yielding poppies may have distinct cultivars or exist as more than just papaver somniferum in Azeroth. Briarthorn tea, etc, can also act as painkillers, though not to the same level and probably aren't of value for hoopleheads, even if they're sold right next to opium and morphine in alchemists shops.