Skip to content
All medicines

Phenobarbital

Brands: Luminal, Solfoton

Phenobarbital is a barbiturate used to manage seizures in pets.

Prescription requiredControlled substancebarbituratesedativedogcat

Used for

  • Epilepsy
  • Seizure disorders

How it is given

Administration
oral
Frequency
twice daily
Duration
lifelong treatment
Storage
Store at room temperature, away from moisture and light
Pregnancy safety
caution

Always confirm the exact dose with your veterinarian before giving any medicine.

Typical dose ranges

cat

Standard
1-2 mg per pound, twice daily

dog

Large dogs
1-2 mg per pound, twice daily
Small dogs
1-2 mg per pound, twice daily
Medium dogs
1-2 mg per pound, twice daily

Ranges are reference only. Your vet sets the dose for your pet's weight and condition.

Active ingredients

  • Phenobarbital

Side effects

Common

  • Drowsiness
  • Increased appetite

Rare

  • Allergic reactions

Severe

  • Liver toxicity

Do not use when

  • Severe liver disease
  • History of hypersensitivity

Interacts with

  • Antifungal medications
  • Certain antibiotics

Warnings

  • Regular monitoring
  • Behavioral changes

Phenobarbital questions

Can Phenobarbital be used in pregnant pets?

Use with caution, consult your veterinarian.

What if a dose is missed?

Administer as soon as remembered unless it's close to the next dose.

Is it safe with other medications?

Discuss all medications with your veterinarian.

Can it cure epilepsy?

It manages symptoms but is not a cure.

How long until effects are seen?

Effects may be observed within a few weeks of consistent use.

Full drug detail

Overview

Phenobarbital is a barbiturate medication commonly used to manage and control seizures in pets, primarily dogs and cats. As a long-acting sedative, it stabilizes electrical activity in the brain, reducing seizure frequency and severity.

How It Works

Phenobarbital works by depressing the central nervous system, specifically targeting the neurotransmitters that cause excessive electrical activity in the brain. This action stabilizes the neuronal environment, preventing seizure episodes.

Uses & Indications

Phenobarbital is primarily prescribed for:

  • Epilepsy: To control and prevent recurrent seizures.
  • Seizure disorders: As a part of comprehensive seizure management.

Dosage Guidelines

Dogs

  • Small Dogs: 1-2 mg per pound of body weight, administered twice daily.
  • Medium Dogs: 1-2 mg per pound of body weight, administered twice daily.
  • Large Dogs: 1-2 mg per pound of body weight, administered twice daily.

Cats

  • Standard: 1-2 mg per pound of body weight, administered twice daily.

Administration

Phenobarbital is administered orally, typically in the form of tablets or liquid.

Frequency

It is usually given twice daily to maintain stable blood levels.

Duration

Phenobarbital is often a lifelong treatment, depending on the pet's condition and response to therapy.

Side Effects

Common

  • Drowsiness
  • Increased appetite

Rare

  • Allergic reactions

Severe

  • Liver toxicity (requires immediate veterinary attention)

Precautions & Warnings

  • Liver Health: Regular liver function tests are recommended.
  • Sedation: Monitor for excessive sedation or behavioral changes.

Drug Interactions

Phenobarbital can interact with:

  • Antifungal medications
  • Certain antibiotics

Contraindications

  • Severe liver disease
  • History of hypersensitivity

Storage

Store at room temperature, away from moisture and light.

FAQ

  1. Can Phenobarbital be used in pregnant pets?
    • Use with caution, consult your veterinarian.
  2. What if a dose is missed?
    • Administer as soon as remembered unless it's close to the next dose.
  3. Is it safe with other medications?
    • Discuss all medications with your veterinarian.
  4. Can it cure epilepsy?
    • It manages symptoms but is not a cure.
  5. How long until effects are seen?
    • Effects may be observed within a few weeks of consistent use.

Meta Title

Phenobarbital for Pets: Usage, Dosage, and Safety

Meta Description

Discover how Phenobarbital can manage seizures in pets. Learn about dosage, side effects, and precautions. Consult your vet for safe use.

Back