Something similar to the UK Drug Tariff exists in most publicly funded health systems.
When a UK family doctor issues an NHS prescription, the patient or representative takes the prescription to a pharmacists business. The pharmacist will dispense the prescription from stock in a suitable container with a label giving the name of the medicine, it's strength, and instructions as to how it is taken and how often. The label may also include one of several warnings suggested in the British National Formulary BNF.  For example antihistamines are often labelled ‘Warning. May cause drowsiness’
The prescriptions are then bundled up and returned to the Prescription Pricing Authority. There each item is priced according to the Drug Tariff and the pharmacist reimbursed for the medicine itself with an allowance for the container and any special additions for example opening out of hours for an urgently needed prescription (this is rare).
The tariff is a very complex document published monthly and multiple versions may be available online  (registration required)