1. phenobarbital

noun. a long-acting barbiturate used as a sedative.


  • sodium thiopental
  • phenobarbitone
  • Luminal
  • purple heart

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Sentences with phenobarbital

1. Noun, singular or mass
If the level is low, your dog may be hypothyroid or the level may have been lowered by a concurrent illness or certain medications such as phenobarbital.

2. Adjective
If phenobarbital is not working well on its own, your vet may prescribe potassium bromide in addition to the phenobarbital.