Encephalopathic syndrome has occurred in a few clients when haloperidol is taken with which medication?

Lithium carbonate.

While in the past it was believed that these two medicines combined could be beneficial. Later, after combined administration, it was realised that it has great adverse effects, such as very high fevers, severe rigidity, mutism, and even irreversible i nvoluntary, repetitive body movements (diskynesia)