Choosing A-Level Subjects for Medicine

Howard Chan

Wrote this guide · international school, Tokyo

IB 45 / 45 (predicted) Incoming Cambridge HSPS Tokyo · UK·US·HK

I remember staring at my course selection form with a genuine sense of panic. Picking A-Levels for medicine feels like gambling with your future. I faced this same pressure while scoring 45/45 in my May 2023 IB session at my school in Tokyo, trying to balance hard sciences with the requirements of top universities.

Now that I hold offers from Cambridge HSPS, HKU, and HKUST, I see how specific subject combinations shape your application. Most students struggle with whether to take Further Maths or just stick to Chemistry and Biology. This guide shows you exactly which subjects admissions tutors value most for a medical degree.

The Non-Negotiables: Chemistry and Biology

Let's get this out of the way: if you're serious about Medicine in the UK, and almost certainly in the US or Hong Kong, Chemistry and Biology are mandatory. There are very, very few exceptions, and relying on them is a high-risk strategy. UK medical schools explicitly state these requirements. For instance, universities like Imperial, Oxford, and Cambridge (for their pre-clinical courses) all list Chemistry as essential, and Biology as either essential or highly recommended.

Think of these as your foundational pillars. Chemistry provides understanding of drug mechanisms and biochemical processes, while Biology covers human anatomy, physiology, and disease. Without a strong grasp of both, you'll struggle significantly in medical school and likely won't even get an interview.

The Critical Third Subject: Mathematics or Physics?

Once Chemistry and Biology are locked in, your third A-Level subject becomes crucial. The most common and highly recommended choice is Mathematics. Why? Medicine is increasingly quantitative. You'll encounter statistics, dosage calculations, physics principles in imaging (MRI, X-ray), and complex data analysis. A-Level Maths demonstrates your ability to handle logical reasoning and numerical concepts, which are vital.

Physics is another strong contender, especially if you have a genuine interest. It's particularly useful for understanding medical imaging, biomechanics, and the physical principles behind many diagnostic tools. However, if you're not strong in Physics, don't force it. A high grade in Maths is generally preferred over a mediocre grade in Physics. Some universities, like UCL, list Maths or Physics as a common third 'facilitating' subject.

The Fourth Subject Dilemma (and Further Maths)

Many students choose to take four A-Levels, especially in their first year. If you're considering a fourth, what should it be? If you're taking Maths, Further Maths is an excellent option if you genuinely excel at it. It showcases exceptional mathematical ability and can be a significant differentiator, particularly for highly competitive courses or universities that value a strong quantitative background.

However, do not take Further Maths (or any fourth subject) if it compromises your grades in your core three. A strong A*A*A in Chemistry, Biology, and Maths is far better than A*AAB with Further Maths. Quality over quantity is paramount. Other options for a fourth subject could be Psychology (demonstrates interest in human behaviour) or even a humanities subject if it genuinely interests you and you can maintain top grades.

Subjects to Approach with Caution

While breadth can be good, some subjects are less directly relevant or may be viewed less favourably by medical admissions committees. General Studies and Critical Thinking, for example, are almost universally not counted towards entry requirements by UK medical schools. Check specific university policies, but assume they won't be.

Applied science A-Levels, while valuable, may not always be seen as equivalent to traditional academic A-Levels by all universities. Always verify directly with your target universities if you're considering these. The safest bet remains the traditional academic science and maths subjects.

The US and Hong Kong Perspective

While the UK has very specific A-Level requirements, the US system is more holistic. However, taking Chemistry, Biology, and Maths at A-Level will still set you up perfectly. These subjects demonstrate rigorous academic preparation for pre-med courses at US universities. Strong A-Level grades can also sometimes lead to course exemptions, though this varies widely by institution.

Hong Kong universities (like HKU and HKUST, both of which I was admitted to for other courses) often have similar expectations to the UK for their medical programmes. They typically require strong performance in Chemistry, Biology, and at least one other science/maths subject. Meeting UK requirements will generally satisfy HK requirements too, offering you more flexibility.

Beyond Subjects: The Holistic Picture

Remember, A-Levels are just one part of your application. While essential, good grades alone won't get you into Medicine. You'll need strong performance in admissions tests (UCAT/BMAT for UK, MCAT later for US), compelling work experience, meaningful volunteering, and a well-articulated personal statement.

Your subject choices are a foundation. They prove you have the academic horsepower. But your extracurriculars and experiences demonstrate your commitment, empathy, communication skills, and understanding of the medical profession. Don't neglect these while obsessing over your A-Levels.

My IB Analogy: The Higher Level Choices

For those familiar with the IB Diploma, the A-Level subject choices for Medicine directly parallel the Higher Level (HL) requirements. An IB student aiming for Medicine would typically take HL Chemistry, HL Biology, and HL Maths (AA or AI, depending on the university's preference, though AA is generally safer). This combination provides the same rigorous academic foundation as the A-Level equivalent.

The principle is the same: demonstrate mastery of the core sciences and quantitative reasoning. The specific curriculum might differ, but the academic competencies being assessed are fundamentally similar across both systems.

Frequently asked questions

Are there any universities that don't require Chemistry for Medicine?

It is extremely rare. Almost all UK medical schools, and top US/HK pre-med tracks, list Chemistry as an essential requirement. Relying on exceptions is a high-risk strategy. Always check specific university entry requirements directly.

Is Psychology a good third or fourth A-Level for Medicine?

Psychology can be a good fourth A-Level, as it demonstrates an interest in human behaviour and mental health, which are relevant to medicine. However, it is generally not recommended as a replacement for Maths or Physics as your third core subject. Prioritise Chemistry, Biology, and Maths/Physics.

Should I take 3 or 4 A-Levels?

Focus on achieving top grades in three strong, relevant A-Levels (Chemistry, Biology, and Maths/Physics). If you are genuinely capable of achieving equally high grades in a fourth subject without compromising your core three, then go for it. Otherwise, quality over quantity.

What if my school doesn't offer Further Maths?

Don't worry. Further Maths is an advantage, not a strict requirement. If your school doesn't offer it, or if you don't feel it's right for you, focus on excelling in your other three A-Levels. Many successful medical applicants do not take Further Maths.

Do A-Level grades matter more than admissions test scores?

Both are critical. A-Level grades demonstrate your foundational academic ability. Admissions test scores (like UCAT/BMAT) are often used to shortlist candidates for interview, as many applicants meet the minimum A-Level requirements. You need to excel at both.

The takeaway

Choosing your A-Level subjects for Medicine is a foundational step. Prioritise Chemistry and Biology as non-negotiables. For your third subject, Mathematics is generally the strongest choice, with Physics as a solid alternative. Only take a fourth subject like Further Maths or Psychology if you are confident it won't dilute your grades in your core three. Remember that while A-Levels are crucial, they are part of a broader application that includes admissions tests, work experience, and a compelling personal statement.