eli5 Why there are multiple types of drugs for certain illnesses?

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When it comes to things like depression and ADHD for example, there are many types of drugs offered for them. Different antidepressants, different stimulants (adderall, Ritalin, etc)

My question is, why is it not a “one size fits all?” What is the science behind adderall working for one ADHD person but not for another, and so they need a different kind?

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Anonymous 0 Comments

Illness names are human descriptions for things that help them to compartmentalise the external presentation of someone who has certain sickness characteristics. In reality they are probably buckets of lots of closely related different diseases. This is more relavent in the neuroscience/mental health area where a specific gene often isn’t the single cause. So 2 people diagnosed with ADHD might be suffering from a slightly different illness or underlying condition, therefore different drugs work in different people.

TLDR: the brain is super complicated so we often group together diseases under umbrella terms. Therefore drugs don’t always work for all people with a disease.

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