Theobromine dose is calculated by multiplying the known amount of chocolate ingested (in grams) by the theobromine concentration for that chocolate type, then dividing by the dog's body weight in kilograms.

The type of chocolate is the critical variable. Dark and bitter chocolate carries the highest risk — 28 of 44 symptomatic dogs in one case series had ingested dark or bitter chocolate, while dogs ingesting milk or white chocolate were far less likely to show signs.Journal of Smal… Once you have the mg/kg theobromine dose, clinical signs guide the urgency of intervention: agitation, tremor, sinus tachycardia, tachypnea, and hyperthermia are the hallmark findings of toxicosis.Journal of Smal…

The arithmetic follows this structure: mg theobromine ingested = grams of chocolate × theobromine concentration (mg/g for that chocolate type) ÷ body weight (kg). For example, using the concentration reported in chocolate chips of 69.7 mg/100 g (= 0.697 mg/g): a 10 kg dog ingesting 100 g of that product would receive 100 g × 0.697 mg/g ÷ 10 kg = 6.97 mg/kg theobromine.Journal of Anim… Caffeine contributes additively to methylxanthine toxicity and should be calculated separately using the same method and summed.Journal of Smal…

Three pieces of information are required to complete the calculation: the chocolate type (which determines concentration), the amount ingested in grams, and the dog's body weight in kilograms. The time of ingestion relative to presentation determines whether decontamination with apomorphine and activated charcoal is still appropriate.Journal of Smal…

Dogs with no clinical signs can still have ingested a meaningful methylxanthine dose — 112 of 156 dogs in one series were asymptomatic at presentation, yet the calculation remained necessary to triage decontamination decisions.Journal of Smal… Among the 44 symptomatic dogs, survival after decontamination and symptomatic treatment (fluid therapy, esmolol, forced diuresis, sedatives) was 43/44, with a mortality rate below 3%.Journal of Smal…

Would you like the specific theobromine concentrations by chocolate type (dark, milk, white, cocoa powder) to complete the dose calculation for your patient?