Phenobarbital is contraindicated in patients who are hypersensitive to barbiturates, in patients with a history of manifest or latent porphyria, and in patients with marked impairment of liver function or respiratory disease in which dyspnea or obstruction is evident.
For more information see: https://www.drugs.com/pro/phenobarbital.html
- Phenobarbital Information for Consumers
- Phenobarbital Information for Healthcare Professionals (includes dosage details)
- Side Effects of Phenobarbital (detailed)
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I give my dog Phenobarbital 1/2 gram tablets, this morning I accidently took one, how will it effect
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