Veterinary CRI & Drug Dose Calculator
This calculator has been developed to support veterinary surgeons and veterinary nurses by simplifying and accelerating the calculation of drug doses and continuous rate infusions (CRI) for dogs and cats. The tool is designed for use in theatre, the emergency and critical care environment, anaesthesia, intensive hospitalisation and pain management. All dose calculations follow recognised veterinary prescribing guidelines and use weight-based equations to minimise calculation errors during busy clinical work. This resource may be used during peri-operative planning, intra-operative support and post-operative recovery, and is particularly useful when preparing complex multi-drug analgesic protocols.
Safety notice
All calculations provided by this tool are intended as a clinical support resource only and do not replace the prescribing veterinarian’s decision-making or responsibility. Drug doses must always be checked against the patient’s history, concurrent disease, physiological status and any contraindications. Drug interactions and compatibility in fluids must be verified before combining drugs in the same bag. Always cross-reference doses with the relevant data sheet and monitor patients continuously during sedation, anaesthesia and CRI therapy.
Clinical applications
The Veterinary CRI & Drug Dose Calculator is useful during opioid analgesic CRIs, multimodal analgesia plans, constant-rate sedative infusions, post-operative pain relief, ventilated patients, anaesthesia maintenance, non-ambulatory and ICU cases, severe trauma, pancreatitis, IMHA, sepsis, status epilepticus and other high-intensity medical scenarios. It supports safe and reliable drug delivery at a time when rapid calculation is essential for patient safety. This tool is continuously updated and feedback from clinicians is welcome.
