The reference
for veterinary medicines
Active ingredient, animal species, withdrawal periods, and drug interactions — all in one place, source-backed with a fast interface.
Calculators that save you time and error
Drug Interactions Checker
NewAdd two or more active ingredients to discover the known interactions between them — sorted by severity, with mechanism, recommendation, and source.
Open calculator →Dose Calculator
Calculate the exact drug amount needed from the animal's weight, the recommended dose, and the product concentration — in clear units.
Open calculator →Withdrawal Period Calculator
Calculate the safe date to slaughter an animal or consume its milk and eggs after the last drug dose, based on documented withdrawal periods.
Open calculator →Choose what suits you
For veterinarians
Drug information, indications, interactions, and source-backed withdrawal periods.
Browse active ingredients →For students
Simplified scientific articles and reviews explaining mechanisms of action and drug classes.
Read the scientific guides →For breeders and animal owners
All calculators at hand: compute the drug dose, the safe slaughter and milk date, and check drug interactions.
Explore all calculators →Growing constantly
15 animal species
Real data from openFDA
| Active ingredient | Species | Symptom | Report count |
|---|---|---|---|
| SpinosadDogs · Emesis | Dogs | Emesis | 55,127 |
| Milbemycin OximeDogs · Emesis | Dogs | Emesis | 42,434 |
| IvermectinDogs · Lack of efficacy (endoparasite) - heartworm | Dogs | Lack of efficacy (endoparasite) - heartworm | 22,576 |
| Pyrantel As Pamoate SaltDogs · Lack of efficacy (endoparasite) - heartworm | Dogs | Lack of efficacy (endoparasite) - heartworm | 18,299 |
| Ivermectin, PyrantelDogs · INEFFECTIVE, HEARTWORM LARVAE | Dogs | INEFFECTIVE, HEARTWORM LARVAE | 16,964 |
| AfoxolanerDogs · Vomiting | Dogs | Vomiting | 13,008 |
| CarprofenDogs · Vomiting | Dogs | Vomiting | 12,300 |
| Fluralaner Chew TabletsDogs · Vomiting | Dogs | Vomiting | 11,859 |
The numbers represent the number of reports opened in openFDA per ingredient/species, not a severity rate or incidence. Click any row to open the active ingredient page.