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Drug of Choice Cheatsheet — Dermatology (MRCP Part 1)

TL;DR

This drug of choice cheatsheet — dermatology focus (mrcp part 1) summarises the most frequently tested first-line treatments in MRCP Part 1 dermatology. It highlights classic exam traps, includes a mini-case, and shows how to revise efficiently using question-based practice. Use it as a rapid-review tool in the final weeks.


Why this matters

In MRCP Part 1, dermatology questions are rarely about obscure diseases. They test whether you can recognise a common condition and choose the correct initial management. Candidates often lose marks not because they misdiagnose, but because they jump to overly aggressive therapy or miss a simple first-line option.

The examiners favour pragmatic, guideline-based decisions that reflect everyday UK clinical practice. Knowing the drug of choice for common dermatological presentations allows you to answer confidently under time pressure and avoid negative marking through guesswork.

This article supports the main MRCP Part 1 overview hub and is designed to be paired with active recall using MCQs rather than passive reading.


Scope of dermatology in MRCP Part 1

MRCP Part 1 dermatology focuses on:

  • Common inflammatory conditions (eczema, psoriasis, acne)

  • Skin infections (bacterial, viral, fungal)

  • Basic blistering disorders

  • Safe and appropriate use of topical and systemic therapies

You are not expected to memorise doses or brand names. The emphasis is on first-line choice, contraindications, and recognising when referral or escalation is needed.


High-yield drug of choice list (exam-oriented)

Below is a numbered, high-yield list covering the most commonly examined scenarios. The bolded option is the answer MRCP Part 1 usually wants.

  1. Atopic eczema (moderate flare) → Topical corticosteroids + liberal emollients

  2. Psoriasis (chronic plaque, mild–moderate) → Topical vitamin D analogue (e.g. calcipotriol) ± topical steroid

  3. Acne vulgaris (moderate) → Topical retinoid + benzoyl peroxide

  4. Impetigo (localised) → Topical fusidic acid or mupirocin

  5. Cellulitis (uncomplicated) → Oral flucloxacillin

  6. Herpes zoster (≤72 hours, immunocompetent) → Oral aciclovir

  7. Scabies → Permethrin 5% cream (treat all close contacts)

  8. Tinea corporis → Topical terbinafine

  9. Seborrhoeic dermatitis → Ketoconazole shampoo

  10. Bullous pemphigoid → High-potency topical corticosteroids

Exam pearl: When faced with two plausible answers, MRCP Part 1 usually rewards the simplest effective first step rather than escalation.


Five most tested dermatology subtopics

1. Eczema and steroid selection

  • Match steroid potency to site and age

  • Avoid potent steroids on face, flexures, and infants

2. Psoriasis

  • Start with topical therapy in limited disease

  • Systemic agents are rarely first-line in MRCP questions

3. Acne

  • Combination therapy reduces resistance

  • Oral isotretinoin is specialist-initiated, not first-line

4. Skin infections

  • Distinguish bacterial, viral, and fungal causes carefully

  • Avoid topical steroids alone in fungal infections

5. Blistering disorders

  • Pemphigus vulgaris → systemic steroids

  • Bullous pemphigoid → topical steroids often first

MRCP Part 1 dermatology exam preparation and drug of choice revision

Mini-case (MRCP style)

Question A 72-year-old man presents with tense blisters on erythematous skin and mild pruritus. There is no oral involvement. A skin biopsy confirms bullous pemphigoid. What is the most appropriate initial management?

Answer High-potency topical corticosteroids.

Explanation Bullous pemphigoid is typically treated initially with potent topical steroids, which are effective and safer in older adults. Systemic steroids are reserved for extensive or refractory disease. Confusing this with pemphigus vulgaris is a classic MRCP trap.


Common pitfalls (and how to avoid them)

  • Using antibiotics for all eczema flares → Treat inflammation unless infection is clear

  • Prescribing potent steroids on the face → Choose low-potency alternatives

  • Confusing herpes simplex with zoster → Dermatomal pain suggests zoster

  • Forgetting to treat contacts in scabies → Treat everyone simultaneously

  • Escalating too early to systemic therapy → MRCP prefers stepwise management


Practical study-tip checklist

  • Learn one default drug of choice per condition

  • Revise dermatology late and repeatedly

  • Practise under time pressure using Free MRCP MCQs

  • Analyse mistakes by theme rather than by question

  • Consolidate with a mock test in the final weeks

For a structured approach across all subjects, integrate this with your overall MRCP Part 1 overview rather than studying dermatology in isolation.


FAQs


Does MRCP Part 1 test drug doses in dermatology?

No. The exam focuses on the correct choice of treatment, not dosing schedules.

Are biologics important for MRCP Part 1 dermatology?

Only at a high level. You should know when they are used, not their mechanisms.

How can I avoid mixing up eczema and psoriasis treatments?

Remember: eczema prioritises emollients and steroids; psoriasis prioritises vitamin D analogues.

Is dermatology high-yield for MRCP Part 1?

Yes. It is memory-based, commonly tested, and ideal for scoring marks with focused revision.

Should I revise dermatology early or late?

Late and repeatedly. Short, frequent revision sessions work best.


Ready to start?

Use this cheatsheet as a rapid-review tool, then reinforce it with real exam-style questions via our Free MRCP MCQs and timed mock tests. For full syllabus coverage, return to the MRCP Part 1 overview hub.


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