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DNB Exam Preparation Guide

Understanding the Exam Structure

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Stage 1 - Theory Preparation

• Solve at least 5 years of DNB Final papers for your specialty
• DNB questions are almost always case-based and management-oriented (e.g., "A 45-year-old presents with... what is your next step?")
• Identify topics that repeat every year - those are guaranteed to appear again

• Pathophysiology of common conditions
• Investigations and their interpretation (ECG, X-ray, labs)
• Standard management protocols (follow current guidelines)
• Complications and their management

• Diagnosis from a clinical presentation
• Choosing the most appropriate investigation
• First-line vs second-line management
• Differentiating between similar conditions

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Stage 2 - Practical / Viva Preparation

• Present long cases and short cases daily during your residency
• Follow a structured approach: history, examination, investigations, diagnosis, management, complications
• Do not memorize answers - examiners test your clinical reasoning process

• Practice procedural skills (suturing, IV access, resuscitation, etc. depending on specialty)
• ECG and X-ray/imaging interpretation
• Drug prescriptions and counseling scenarios
• Instrument identification

• Know common surgical instruments, pathology slides, and anatomical specimens relevant to your specialty
• Go through previous OSCE image questions if available

• Read up on recent guideline updates (e.g., updated WHO, ICMR, or specialty-specific society guidelines)
• Be confident with drug doses, drug classes, and mechanisms
• Prepare to discuss your dissertation/thesis clearly

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General Preparation Strategy

• Allocate ~60-70% time to theory, rest to practical skills
• Set weekly targets and track them
• Do multiple revisions - high-yield topics should be revised at least 3 times
• Form a study group for case discussions and viva practice
• Use online MCQ platforms (Prepladder, Marrow, DocTutorials) for specialty-specific questions in CBT mode

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Commonly Challenging Subjects

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NEET-PG vs DNB - What's the Difference?

The Entrance Exam

• NEET-PG = the ONE entrance exam for ALL PG medical seats in India
• You do NOT give a separate exam to "get into" DNB
• Your NEET-PG rank determines whether you get an MD/MS seat OR a DNB seat (or both options in counseling)

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After NEET-PG - Two Pathways

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Is DNB equivalent to MD/MS?

• Teach in medical colleges (subject to NMC rules on faculty eligibility)
• Apply for superspecialty (DM/MCh/DrNB) programs
• Practice as specialists

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How Admission to DNB Works

1. Give NEET-PG (single entrance exam)
2. During MCC counseling, you will see seats listed as:
   • MD/MS seats at medical colleges
   • DNB seats at government hospitals (e.g., AIIMS, PGIMER, RML, Safdarjung - these are highly coveted)
3. Private DNB seats (at accredited private hospitals) have a separate admission process through NBEMS - these do NOT go through MCC counseling
4. You choose based on your rank, preference, and available seats

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Key Points to Remember

• Good NEET-PG rank = access to both MD/MS AND good DNB govt seats
• DNB at government hospitals (like AIIMS, RML, Safdarjung) is highly competitive and comparable to MD/MS at top colleges
• DNB at private hospitals = lower cutoff, but training quality varies significantly by hospital - research the hospital before joining
• After DNB, you can do DrNB (superspecialty) which is the DNB equivalent of DM/MCh

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Migraine - Full Treatment Guide

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Part 1 - Acute (Abortive) Treatment

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Step 1 - Mild to Moderate Attacks (First Line)

• Aspirin, ibuprofen, naproxen, or acetaminophen
• Try 2-3 different NSAIDs across separate attacks to find the best one
• Use moderately high doses if needed
• Warning: Overuse (>10-15 days/month) causes medication overuse headache (MOH/rebound headache) - a cycle of relief then worsening

• Sumatriptan + naproxen (available as a fixed-dose oral combination)
• Aspirin + acetaminophen + caffeine (OTC combination)

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Step 2 - Moderate to Severe Attacks (Disease-Specific)

A. Triptans (First-Line Specific Therapy)

• Give SC/nasal during aura; give oral during aura or at headache onset
• If one triptan fails, try a different one or a different route
• Headache recurrence within 24-48 hours is common; a second dose is usually effective
• Contraindicated in: ischemic heart disease, uncontrolled hypertension, basilar/hemiplegic migraine, cerebrovascular disease
• Side effects: chest/neck/jaw pressure, dizziness, malaise

B. Ergot Alkaloids

• Contraindicated in: pregnancy (Cat X), coronary artery disease, peripheral vascular disease, uncontrolled hypertension, within 24h of triptan use
• Main side effects: nausea, vomiting, vasoconstriction

C. Newer Agents (When Triptans/Ergots are Contraindicated or Failed)

• Lasmiditan (oral) - selective 5-HT1F agonist; does NOT cause vasoconstriction, safe in cardiovascular disease; classified as a controlled substance; causes driving impairment

• Ubrogepant (oral) - acute migraine; avoid with strong CYP3A4 inhibitors
• Rimegepant (oral) - can be used for both acute AND prevention
• CGRP levels are elevated during acute migraine attacks
• Side effects: nausea, somnolence (low incidence)

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Step 3 - Antiemetics (Adjunct Treatment)

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Step 4 - Emergency / Refractory Migraine

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Part 2 - Preventive (Prophylactic) Treatment

First-Line Preventives

Second-Line Preventives

Newer/Advanced Preventives

• Erenumab - targets the CGRP receptor
• Galcanezumab - targets CGRP ligand
• Fremanezumab - targets CGRP ligand
• Eptinezumab - IV infusion quarterly

• Rimegepant and Atogepant - can be used for prevention

• Injected into temporalis and other cranial muscles
• Provides headache relief for 2-4 months per treatment cycle
• Used in chronic migraine (>15 headache days/month)

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Part 3 - Non-Pharmacological Measures

• Trigger avoidance: Chocolate, red wine, smoked/processed meats, peanuts, oranges, aged cheese, caffeine (excessive)
• Regular sleep schedule - both sleep deprivation and oversleeping trigger attacks
• Stress management - structured lifestyle changes, avoiding hard-driving patterns
• Biofeedback and relaxation therapy - supported by trials though results vary
• Acupuncture - has advocates; evidence modest
• Refractive error correction - if applicable
• Caffeine: Limiting helps prevent rebound; small amounts during attack may help
• Menstrual migraine: Frovatriptan (long half-life) or indomethacin taken perimenstrually can be preventive

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Quick Reference Summary

MILD ATTACK        → NSAIDs / Acetaminophen
MODERATE-SEVERE    → Triptans (oral/nasal) ± antiemetic
SEVERE/EARLY       → Sumatriptan SC, or DHE IV + antiemetic
NO TRIPTAN/CVD     → Lasmiditan or Gepants (ubrogepant, rimegepant)
EMERGENCY DEPT     → Ketorolac IV + prochlorperazine IV + dexamethasone IV
PREVENTION (1st)   → Beta-blocker OR amitriptyline OR topiramate/valproate
PREVENTION (2nd)   → Calcium channel blockers, CGRP antibodies, Botox

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Recent evidence (2025): A new evidence-based guideline published in Cephalalgia (April 2025, PMID 40277319) provides updated pharmacological treatment recommendations - consistent with the above framework but may include updated rankings for gepants and CGRP antibodies as first-line options in certain patient populations.