Calluna is a popular painkilling drug manufactured by Boo Labs. It is sold over the counter in most pharmacies, but is also used in hospitals for more minor injuries, due to its powerful painkilling properties. The painkilling properties are bestowed upon it through the use of a type of heather found in the Boondoxian highlands. The leaves of this heather contain high proportions of ibooprofen, a powerful pain reliever. The leaves themselves are poisonous, and hence must be processed into Calluna before being consumed. Calluna has a pleasant sweet taste, which many have likened to creamy coconut.
Exilia is known to have banned Calluna, despite its healing properties, yet the true reasons for this are unclear.