How to Read Your Pet's Prescription: A Plain-English Guide

Your vet hands you a prescription for your dog or cat, and suddenly you are looking at a document that seems more suited to a chemistry degree than to pet ownership. Latin abbreviations, drug names that bear no resemblance to what the vet called the medication in the consultation room, and a set of instructions that feel just ambiguous enough to make you hesitant about whether you have understood them correctly.

This is a completely normal experience. Veterinary prescriptions use a language that evolved from medical and pharmaceutical tradition, and much of it is not self-explanatory. Scriptly is Australia's own online pet pharmacy, and we want to make sure every pet owner can read, understand, and confidently fill their pet's prescription. This guide explains every section of a typical veterinary prescription in plain English.

 

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The Parts of a Veterinary Prescription

A veterinary prescription in Australia is a legal document issued by a registered veterinarian under the relevant state or territory veterinary practitioners legislation. It authorises the supply of a prescription-only medication for a specific animal by a licensed pharmacist or veterinary supply professional. Understanding each section helps you verify the prescription is complete and fill it correctly.

Pet and owner details

The prescription will identify the patient (your pet) and the owner. This section typically includes:

•        Patient name: your pet's name

•        Species: dog, cat, rabbit, etc. This matters because many drugs are dosed very differently between species and some are safe in one species but dangerous in another

•        Breed: occasionally relevant, as certain breeds have specific drug sensitivities

•        Weight: the dosing of most veterinary medications is calculated by body weight. The weight on the prescription reflects your pet's weight at the time of issue and is used to calculate the prescribed dose

•        Owner name and contact details: your name and typically your address and phone number

Prescribing veterinarian details

The prescription must identify the prescribing veterinarian. This includes:

•        Veterinarian name: the vet who examined your pet and issued the prescription

•        Practice name and contact details: the clinic where the prescription was issued

•        Veterinarian registration number: in Australia, veterinarians are registered under their state or territory veterinary board. The registration number allows the pharmacy to verify that the prescription was issued by a licensed professional

•        Date of issue: prescriptions have a validity period. Most veterinary prescriptions in Australia are valid for a specified time (often three to six months, though this can vary) from the date of issue. After that date, a new prescription is required

The drug details

This is typically the most confusing section for pet owners. It includes:

•        Drug name: this may be the generic name (the actual chemical name of the active ingredient) or the brand name (the commercial product name). For example, meloxicam is a generic name; Metacam is one brand of meloxicam. The two are interchangeable in many contexts but your vet may specify one or the other

•        Strength or concentration: the amount of the active ingredient per unit. For a tablet, this might be 5mg or 10mg. For a liquid, it might be 1mg/mL or 5mg/mL. The strength tells you how much drug is in each dose unit and is used to calculate how many tablets or how much liquid constitutes the prescribed dose

•        Form: tablet, capsule, solution, suspension, topical cream, drops, paste, and so on. The form affects how the medication is given and how it is stored

Dosing instructions

The dosing instructions tell you exactly how to give the medication. This is where most of the Latin abbreviations appear:

•        Sig: short for the Latin signetur (let it be labelled). Everything following Sig is the instruction for use that will appear on the dispensed medication label

•        Dose amount: how much to give per dose, expressed as a number of tablets, millilitres, or similar. This is calculated from the drug strength and your pet's body weight

•        Frequency: how often to give the medication. Expressed using abbreviations listed below

•        Route of administration: how the medication is given. Also expressed using abbreviations below

•        Duration: how long the course of treatment runs. Some medications are prescribed for a defined period (seven days, fourteen days); others are ongoing until review

•        Special instructions: for example, 'give with food,' 'do not crush,' or 'keep refrigerated'

Common Veterinary Prescription Abbreviations: Decoded

Here are the most common abbreviations you will encounter on a veterinary prescription:

Abbreviation	What it means	Plain-English translation
SID or q24h	Semel in die / every 24 hours	Once daily
BID or q12h	Bis in die / every 12 hours	Twice daily
TID or q8h	Ter in die / every 8 hours	Three times daily
QID or q6h	Quater in die / every 6 hours	Four times daily
PRN	Pro re nata	As needed (only when required)
PO	Per os	By mouth (orally)
SC or SQ	Subcutaneous	Under the skin (injection)
IM	Intramuscular	Into the muscle (injection)
w/f	With food	Give with a meal
Disp	Dispense	The quantity to be supplied
Qty	Quantity	Total number of units to supply
mL	Millilitre	Volume of liquid
mg	Milligram	Weight of drug per dose
mcg	Microgram	One-thousandth of a milligram
Tabs	Tablets	Number of tablets
Caps	Capsules	Number of capsules

 

Generic vs Brand Name: What's the Difference?

This is one of the most practical questions pet owners ask. A generic medication contains the same active ingredient at the same strength as the brand-name product. In human pharmacy, generic substitution is common and well-regulated. In veterinary pharmacy, the situation is similar: the active ingredient is the same, but the excipients (inactive ingredients), formulation, and manufacturer may differ.

Whether you can substitute a generic for a brand, or vice versa, depends on:

•        What the vet has specified on the prescription: if the prescription specifies 'brand only' or 'no substitution,' those instructions should be followed and the reason clarified with your vet if you would like to discuss cost alternatives

•        Therapeutic equivalence: for most pet medications, generic and brand-name versions with the same active ingredient are therapeutically equivalent. Your vet or the pharmacy can confirm this for specific medications

•        Formulation differences: for some medications, particularly those where the rate of absorption matters (such as some thyroid medications), the specific formulation may be clinically relevant and substitution should be discussed with the prescribing vet

 

🐾  When in doubt, ask the pharmacy: If you are uncertain whether a generic can be substituted for the brand your vet prescribed, ask the pharmacist when you fill the prescription. They can confirm whether substitution is appropriate and flag any cases where it should be checked with the prescribing vet first.

 

Controlled and Scheduled Medications

Some veterinary medications are controlled drugs or scheduled substances under Australian law. These include certain pain medications, anaesthetic agents, and other drugs with potential for misuse. Prescriptions for controlled drugs have additional requirements:

•        The prescription must include the prescribing vet's registration number and signature

•        A controlled drug prescription is generally single-use and cannot be repeated without a new prescription

•        The pharmacy or supplier must maintain records of dispensed controlled drugs

•        These medications are dispensed in specific quantities and cannot be supplied beyond the prescribed amount

If your pet has been prescribed a controlled drug, the vet will advise you specifically on the dispensing and handling requirements. Handle and store these medications as directed.

How to Fill a Pet Prescription Online at Scriptly

Filling a pet prescription online is straightforward with Scriptly. The process is designed to be simple for pet owners while maintaining the legal requirements for prescription medication supply in Australia:

1.     Upload or send in your valid veterinary prescription as directed on the Scriptly website

2.     The Scriptly team verifies the prescription against the legal requirements

3.     Your medication is dispensed and shipped directly to your address

Scriptly handles both over-the-counter pet medications and prescription pet medications. Visit the how-to-order page for current instructions on submitting a prescription. If you have questions about whether a specific product requires a prescription or about the process, contact the Scriptly team.

What to Do If You Cannot Read or Understand the Prescription

If any part of your pet's prescription is unclear, the best first step is always to ask the prescribing vet or their practice to clarify. A responsible prescribing vet will be happy to explain:

•        What the medication is and what it is treating

•        Exactly how much to give and how often

•        Whether to give it with food

•        What to do if a dose is missed

•        What side effects to watch for

•        When to follow up or when to stop the medication

Do not guess at a dosing instruction you are not certain about. An incorrect dose of a pet medication can cause harm, and a dose that is too low may be ineffective. Clarity before you start is always the right move.

 

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Frequently Asked Questions

How long is a veterinary prescription valid in Australia?

Prescription validity varies by state and territory legislation, the type of medication, and the prescribing vet's instructions. Most standard veterinary prescriptions in Australia are written with a validity period noted on the prescription itself, typically between one and six months. A controlled drug prescription generally has a shorter or single-use validity. If your prescription does not include an expiry date, confirm the validity with the prescribing vet or clinic. Scriptly cannot dispense medications against an expired prescription.

Can I get a repeat on my pet's prescription?

Whether a prescription can be repeated depends on the medication type, the vet's instructions, and the relevant state or territory legislation. Some prescriptions include a repeat authorisation (noted on the prescription as 'repeat x times'). Controlled drugs generally cannot be repeated and require a fresh prescription for each supply. For ongoing medications, your vet may issue a prescription that allows for a limited number of repeats or may require a review appointment before reissuing. Contact Scriptly if you have questions about filling a repeat prescription.

Why do some pet medications not need a prescription?

In Australia, medications are classified according to their potential for harm, misuse, and the level of oversight required for safe use. Over-the-counter pet products (such as many flea and tick treatments, worming products, and general supplements) can be supplied without a prescription because they are considered safe for use without veterinary oversight when label directions are followed. Prescription medications carry greater risk of harm if incorrectly used and require veterinary assessment and authorisation. Scriptly stocks both over-the-counter and prescription pet medications for dogs and for cats.