Orc Draught is an invigorating drink used by Orcs, which inflicts damage when drunk but restores some hunger and grants speed and strength buffs. It is essentially Sauron's imitation of elven Miruvor.

What did the orc give Merry to drink?

"Give them this," said Gandalf, searching in his pack and drawing out a leathern flask. "Just a mouthful each - for all of us. It is very precious. It is miruvor, the cordial of Imladris.

What would an orc drink?

Kapurd: a mushroom drink made from fermented mushrooms and algae. Kapurd would be the "beer" of the orcs...made from mushrooms that aren't all that good to eat; but Kapurd pits set in stony recesses would be common in orcish lairs.