How to Read a Doctor’s Prescription: Parts, Abbreviations & Examples

Learn how to read a doctor’s prescription with this complete guide for pharmacy, nursing, and paramedical students. Understand its structure, abbreviations, and examples used in Indian medical practice.

Keywords:

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Introduction

A doctor’s prescription is more than a piece of paper — it is a legal and scientific document that bridges the gap between the doctor, pharmacist, and patient. For healthcare students, learning how to read a prescription correctly is a fundamental skill that ensures safe and effective patient care.

In this article, we’ll break down the parts of a prescription, explain common abbreviations, and show a sample prescription with interpretation, following the Indian format.

🩹 What Is a Prescription?

A prescription is a written order from a registered medical practitioner authorizing a pharmacist to prepare and dispense a specific medication to a patient.

It contains detailed instructions regarding the drug name, dosage form, strength, frequency, route of administration, and duration of treatment.

⚖️ Legal Requirements of a Prescription (India)

According to the Drugs and Cosmetics Act, 1940 and the Pharmacy Act, 1948, a valid prescription in India must include:

1. Name, address, and registration number of the prescriber (doctor).

2. Date of prescription.

3. Name and age of the patient.

4. Superscription (Rx symbol).

5. Details of the prescribed medicine.

6. Directions to the pharmacist and the patient.

7. Signature of the prescriber.

Prescriptions for Schedule H, H1, and X drugs must follow special rules and cannot be refilled without authorization.

🧠 Parts of a Prescription

A typical prescription has five main parts, each serving a specific function.

1️⃣ Superscription

This section begins with the symbol “Rx”, derived from the Latin word “Recipe” meaning “to take”.

It indicates the start of the prescription and is a direction to the pharmacist.

2️⃣ Inscription

This is the body of the prescription — it contains the details of the medicines to be dispensed.

It includes:

Name of the drug (Generic/Brand)

Dosage form (Tablet, Syrup, Ointment)

Strength (e.g., 500 mg)

Quantity to be supplied

Example:

Amoxicillin 500 mg capsules — 15 capsules

3️⃣ Subscription

This part includes the instructions to the pharmacist on how to prepare or dispense the medication.

In modern practice, this is often printed automatically by the doctor’s software (e.g., “Dispense 10 tablets”).

4️⃣ Signa (or Transcription)

These are directions to the patient, written by the doctor and later explained by the pharmacist.

It includes: Dose (how much to take)

Frequency (how often)

Route (by mouth, external, etc.)

Duration (for how many days)

Example: Take one tablet twice daily after food for 5 days.

5️⃣ Signature of the Prescriber

This authenticates the prescription. It must include:

Doctor’s handwritten or digital signature

Registration number (MCI/State Medical Council)

Contact details (clinic or hospital address)

📘 Common Prescription Abbreviations (India)

             Abbreviation                     Example

• OD Once daily Tab Paracetamol 500 mg OD
• BD Twice daily Amoxicillin 500 mg BD
• TID Thrice daily Metronidazole 400 mg TID
• QID Four times a day Tab Ranitidine 150 mg QID
• SOS When required Painkiller SOS
• HS At bedtime Take 1 tablet HS
• AC Before food Tab Ranitidine AC
• PC After food Tab Paracetamol PC
• PO By mouth Syrup PO
• IM Intramuscular — Injection IM
• IV Intravenous — Injection IV

🧩 How to Read a Prescription – Step by Step

1️⃣ Identify patient details – Check the name, age, and date to ensure accuracy.

2️⃣ Read the drug name carefully – Look for the generic name first, then confirm brand.

3️⃣ Check the strength and dosage form – Tablet, capsule, syrup, etc.

4️⃣ Note the frequency and duration – Example: BD × 5 days = 2 times daily for 5 days.

5️⃣ Understand abbreviations – Decode symbols like OD, BD, SOS, etc.

6️⃣ Look for special instructions – “After food”, “before food”, or storage notes.

7️⃣ Check doctor’s details and signature – Ensures it’s valid and authentic.

8️⃣ Clarify doubtful handwriting – Pharmacists must confirm unclear prescriptions with the prescriber.

💊 Example: Reading a Sample Prescription

Prescription Example:

> Rx

Amoxicillin 500 mg – 15 capsules

Paracetamol 500 mg – 10 tablets

Take one capsule BD after food for 5 days

Take one tablet SOS for fever

Dr. Ramesh Kumar, MBBS

Reg. No. 12345

date

Signature

Interpretation:

• The patient should take Amoxicillin 500 mg twice daily after meals for 5 days .
• Paracetamol 500 mg should be taken only when fever occurs (SOS).
• The prescription is signed and valid as per Indian guidelines.

🧷 Common Errors Students Should Avoid

• Confusing OD (once daily) with BD (twice daily)
• Ignoring the route of administration
• Misreading handwriting without confirmation
• Skipping the expiry check of medicines
• Failing to explain instructions clearly to the patient

🔗 Related Post:

📎 How to Store Medicines Safely at Home

  https://madhupharmadiary.blogspot.com/2025/11/how-to-store-medicines-safely-at-home.html

🧑‍⚕️ About me

I am a pharmacy graduate who focuses on sharing reliable health and medicine safety tips for families and healthcare students.

⚠️ Disclaimer

This blog is for educational purposes only and should not be considered medical advice. Always consult a registered medical practitioner for diagnosis and treatment.