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Thiamine

Vitamin B1

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Sourced from published veterinary references. Awaiting credentialed clinical reviewer — our editorial process.

Drug Class

Supplement

Routes

POIMSCIV

Indications

PolioencephalomalaciaThiamine deficiencyThiamine deficiency (fish-fed reptiles)Thiamine deficiency (neurological signs)

Mechanism of Action

Essential cofactor for pyruvate dehydrogenase, alpha-ketoglutarate dehydrogenase, and transketolase in energy metabolism. Critical for neurological function.

Side effects & warnings

Deficiency causes polioencephalomalacia in ruminants and neurological signs in cats (fish-based diets, cooked meat diets). IV thiamine can cause anaphylaxis — give IM or slow IV. Very safe orally.

Species with Thiamine dosing data (7 dose rules)

Species references:All African Grey Parrot drugsAll Bearded Dragon drugsAll Cat (Domestic) drugsAll Cattle (Beef/Dairy) drugsAll Goat (Caprine) drugsAll Guinea Pig drugsAll Sheep (Ovine) drugs

Evidence levels across 7 dose rules

Each ExoticRx dose rule is graded by the strength of its primary evidence — see the editorial process.

Backed by 3 published sources

  • · Carpenter's Exotic Animal Formulary, 6th Ed
  • · Merck Veterinary Manual
  • · Plumb's Veterinary Drug Handbook, 9th Ed

Sample dosing (1 of 7 cited rules)

A dog/cat sample is shown here. Cited dosing for all 7 species — reptiles, birds, pocket pets, livestock, and equine — is free on the per-species pages above. Pro adds the weight-based calculator for every species.

SpeciesRouteDoseFrequencyEvidenceSource
Cat (Domestic)IM25–50 mg per catq24hStrongPlumb's Veterinary Drug Handbook, 9th Ed

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