Drug Choices Dermatology MRCP Part 1

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TL;DR

This drug of choice cheatsheet — dermatology focus (MRCP Part 1) summarises the most frequently tested dermatology treatments you must recognise rapidly in exam questions. MRCP Part 1 commonly tests first-line therapies and treatment hierarchies rather than rare conditions. Mastering core drug–disease associations is one of the fastest ways to gain marks in the dermatology section.

Why this matters

Dermatology questions in MRCP Part 1 frequently test treatment decisions rather than diagnosis. Candidates are expected to recognise first-line therapy, escalation options, and important drug safety considerations.

Learning drug–condition associations is a high-yield strategy when preparing using the MRCP Part 1 overview. Reinforcement through practice questions such as Free MRCP MCQs and structured revision through MRCP lectures helps consolidate these patterns.

This guide focuses on the dermatology treatments most likely to appear in MRCP-style single-best-answer questions.

Core dermatology drug choices

The following table summarises essential dermatology drug associations tested repeatedly in MRCP Part 1.

Condition	Drug of Choice	Key Exam Point
Acne vulgaris (moderate–severe)	Oral doxycycline	Combine with benzoyl peroxide
Severe acne	Isotretinoin	Teratogenic and lipid elevation
Mild psoriasis	Topical corticosteroids + vitamin D analogue	First-line therapy
Severe psoriasis	Methotrexate	Monitor FBC and LFTs
Atopic eczema flare	Topical corticosteroids	Emollients baseline treatment
Impetigo (localised)	Topical fusidic acid	Oral therapy if extensive
Scabies	Permethrin 5% cream	Treat close contacts
Tinea corporis	Topical terbinafine	Oral therapy if widespread
Bullous pemphigoid	Potent topical steroids	Common in elderly
Dermatitis herpetiformis	Dapsone	Associated with coeliac disease
Rosacea	Topical metronidazole	Steroids worsen condition
Herpes zoster	Oral aciclovir	Start within 72 hours

These drug associations are repeatedly emphasised in MRCP preparation materials and guidelines.

The five most tested dermatology subtopics

1. Acne treatment hierarchy

MRCP Part 1 questions frequently assess stepwise acne management.

Typical progression:

Topical retinoid ± benzoyl peroxide
Add oral doxycycline
Severe disease → isotretinoin

Important exam facts:

Isotretinoin is highly teratogenic
Causes dry skin and cheilitis
May increase triglycerides

Guideline reference:

https://cks.nice.org.uk/topics/acne-vulgaris/

2. Psoriasis therapies

You must distinguish between topical and systemic treatment.

First-line therapy:

Emollients
Topical steroids
Vitamin D analogues

Systemic therapy:

Methotrexate
Ciclosporin
Biologics

Guideline reference:

https://www.nice.org.uk/guidance/cg153

Typical MRCP-style scenario:

Patient with extensive plaque psoriasis not controlled with topical therapy → Methotrexate.

3. Infectious dermatology

These questions are common and usually straightforward.

High-yield associations include:

Scabies → permethrin
Impetigo → fusidic acid
Dermatophytes → terbinafine
Candida → fluconazole

Guideline references:

https://cks.nice.org.uk/topics/scabies/

https://cks.nice.org.uk/topics/impetigo/

Key principle:

Topical therapy → local disease
Oral therapy → extensive disease

4. Autoimmune blistering disorders

MRCP frequently tests differentiation between pemphigus and pemphigoid.

Bullous pemphigoid

Elderly patients
Tense blisters
Minimal mucosal involvement
Treatment → potent topical steroids

Guideline reference:

https://cks.nice.org.uk/topics/bullous-pemphigoid/

Pemphigus vulgaris

Flaccid blisters
Mucosal involvement
Treatment → systemic steroids

5. Eczema therapy

A fundamental MRCP topic.

Baseline therapy:

Emollients

Flare treatment:

Topical corticosteroids

Steroid-sparing therapy:

Tacrolimus
Pimecrolimus

Guideline reference:

https://cks.nice.org.uk/topics/atopic-eczema/

Essential exam rule:

Emollients are continuous therapy, not rescue therapy.

High-yield dermatology drug facts

These ten facts are particularly useful for rapid revision:

Permethrin is first-line for scabies
Dapsone treats dermatitis herpetiformis
Methotrexate treats severe psoriasis
Isotretinoin is teratogenic
Fusidic acid treats localised impetigo
Terbinafine treats dermatophytes
Aciclovir treats herpes zoster
Topical steroids treat eczema flares
Metronidazole treats rosacea
Potent topical steroids treat bullous pemphigoid

Practical examples / mini-case

MRCP-style question

A 75-year-old woman develops tense blisters over the trunk and thighs. Oral mucosa is normal. A biopsy confirms bullous pemphigoid.

What is the most appropriate initial treatment?

A. MethotrexateB. FlucloxacillinC. DapsoneD. Topical clobetasolE. Aciclovir

Answer: D – Topical clobetasol

Explanation

Bullous pemphigoid is typically treated with high-potency topical corticosteroids as first-line therapy. Systemic therapy is reserved for severe disease.

Common pitfalls

1. Confusing pemphigus and pemphigoid

Pemphigus:

Flaccid blisters
Systemic steroids

Pemphigoid:

Tense blisters
Topical steroids

2. Forgetting emollients in eczema

Emollients are always part of treatment even when steroids are prescribed.

3. Over-treating impetigo

Localised impetigo should be treated with topical antibiotics.

4. Using steroids in rosacea

Topical steroids worsen rosacea and are incorrect in exam questions.

5. Missing isotretinoin safety issues

Teratogenicity and lipid abnormalities are frequently tested.

Practical study-tip checklist

Use this revision checklist:

✔ Memorise 20–30 drug–disease associations✔ Focus on common diseases✔ Learn first-line treatments✔ Understand escalation therapy✔ Revise side effects✔ Practise MCQs regularly✔ Review errors systematically✔ Use guideline-based revision

Online MRCP Part 1 dermatology revision using question bank and notes

FAQs

Which dermatology treatments are most important for MRCP Part 1?

High-yield treatments include methotrexate, isotretinoin, permethrin, terbinafine, dapsone, topical corticosteroids and aciclovir. These frequently appear in single-best-answer questions.

How are dermatology treatments tested in MRCP Part 1?

Questions usually test first-line therapy, escalation strategies, or safest treatment options rather than rare conditions.

How many drug associations should I learn for MRCP Part 1?

Learning 20–40 key drug–condition pairs usually covers most dermatology treatment questions.

Are NICE guidelines important for MRCP Part 1?

Yes. MRCP questions often reflect UK guideline-based practice, especially NICE Clinical Knowledge Summaries.

Ready to start?

Strengthen your dermatology treatment recall using the MRCP Part 1 overview and reinforce knowledge with Free MRCP MCQs. Structured teaching through MRCP lectures helps consolidate high-yield exam topics.