How to Write a Medical Prescription: Format, Parts and Abbreviations

A medical prescription is a written instruction from a registered doctor that tells the pharmacist what to dispense and tells the patient how to take it. A good prescription identifies the doctor and the patient, lists each medicine with its strength, dose, frequency and duration, and is easy for anyone to read.

This guide covers the standard format, what each part should contain, and the small habits that prevent dispensing errors.

This guide is for general information only. It is not medical or legal advice. It is meant for registered medical practitioners. Medicine choice, dose and duration are clinical decisions for the prescribing doctor, and any medicine shown here only illustrates the format. Check current requirements with the National Medical Commission and your State Medical Council.

What is the standard format of a prescription?

Traditionally, a prescription has four parts:

• Superscription: the "Rx" symbol, from the Latin recipe, meaning "take". It marks the start of the medicines.
• Inscription: the medicine name, strength and dosage form, such as tablet, syrup or injection.
• Subscription: directions for the pharmacist, such as the quantity to dispense.
• Signa (or transcription): directions for the patient: how much to take, how often, for how long, and when.

A modern prescription wraps these four parts with doctor, patient and clinical details, so the full document reads from top to bottom like this:

1. Doctor and clinic details
2. Date
3. Patient details
4. Chief complaints or diagnosis
5. Rx: medicines with dose, frequency, duration and instructions
6. Advice and follow-up
7. Doctor's signature

What details should a prescription include?

Doctor and clinic details

The doctor's full name, qualifications, registration number, clinic name, address and contact number. In India, the Indian Medical Council (Professional Conduct, Etiquette and Ethics) Regulations, 2002 ask every physician to display their registration number on all prescriptions (clause 1.4.2).

Patient details

The patient's name, age, gender and the date of the visit. Many clinics also add an OPD or registration number so the visit can be traced later. Age matters more than it seems: it helps the pharmacist double-check paediatric and geriatric doses.

Clinical information

Chief complaints and, where appropriate, the diagnosis. Even a short note helps the next doctor who sees the patient, and it helps the pharmacist understand why a medicine was chosen.

Medicines

Each medicine on its own line, with:

• Name: the 2002 Regulations ask doctors to prescribe drugs by generic name as far as possible, legibly and preferably in capital letters (clause 1.5).
• Strength and form: for example 500 mg tablet or 5 ml syrup.
• Dose: how much to take at a time.
• Frequency: how often to take it.
• Duration: how many days to continue.
• Instructions: timing relative to meals, or any special directions.

An illustrative line, showing the format only:

TAB. PARACETAMOL 500 mg: 1 tablet, three times a day after food, for 3 days

Advice and follow-up

Diet, rest, investigations to get done, warning signs to watch for, and when to come back.

Signature

The prescribing doctor's signature, which confirms that the prescription is genuine.

Requirements can differ by state, specialty and type of medicine, so check current guidance from the National Medical Commission and your State Medical Council.

What do common prescription abbreviations mean?

These are widely used on prescriptions in India:

• OD: once a day
• BD (or BID): twice a day
• TDS (or TID): three times a day
• QID (or QDS): four times a day
• HS: at bedtime
• SOS: only if needed
• PRN: as needed
• AC: before food
• PC: after food
• STAT: immediately

Many Indian doctors also use the 1-0-1 pattern for morning, afternoon and night. For example, 1-0-1 means one dose in the morning, none in the afternoon and one at night.

Abbreviations save time but can be misread. "OD" can also mean "right eye", and handwritten "QD" and "QID" are easily confused. When in doubt, write the instruction in full, especially for patients who will read the prescription themselves.

What are the most common prescription mistakes?

• Illegible handwriting. This is still the most common reason a pharmacist calls the clinic.
• Missing strength or form. "Tab. Amoxicillin" without a strength leaves the pharmacist guessing.
• No duration. Patients stop too early or continue too long.
• Ambiguous abbreviations. Spell out anything that could be read two ways.
• Trailing zeros and missing leading zeros. Write 5 mg, not 5.0 mg, and 0.5 mg, not .5 mg, so a dose is never misread as ten times larger.
• Missing patient age. This makes dose checks harder for children and older adults.

Handwritten or printed: which is better?

Both are valid when they contain the right information and are signed by the doctor. Printed prescriptions remove the legibility problem entirely, look more professional, and are easier for patients to keep and share with a pharmacy. A consistent layout also makes it harder to forget a field such as duration.

How can you create a prescription online for free?

Doctopath's free doctor prescription pad lets you prepare a printable prescription in your browser:

1. Enter the date and the patient's name, age, gender and OPD number.
2. Add each medicine with its dose, frequency, duration and instructions.
3. Add chief complaints and advice or follow-up instructions.
4. Click Generate Prescription and enter your doctor and clinic details.
5. Print the prescription or save it as a PDF.

No account is needed. Patient details and medicines stay in your browser and are not sent to Doctopath.

When does a clinic need more than a prescription pad?

A prescription pad works well for an individual prescription. If you also want each patient's previous prescriptions on screen, reusable medicine lists, appointments and billing in one place, see what Doctopath's practice management software includes.