Preparing for an ADHD assessment is a big task. Here's some things that I'd recommend sorting out to get the best outcomes:

• Complete ADHD screening test(s), make special note of things that you struggle with or that you have strategies to compensate for. This one is a fine place to start with screening tests, scroll down to get to the questionnaire itself.

• Any prior diagnoses, even ones that have been later ruled out and provisional diagnoses.

• A general history of the psychiatric medications that you have taken and how you have responded to each.

• School reports or a summary of how you performed in school, especially if it comes from family members - general trends, key themes that appeared repeatedly especially regarding "needs to apply themselves more", "is often distracted/distracts others", "is held back by being disorganised", "performs well in class but rarely completes homework", "struggles with time-management", "always leaves things to the last minute", "engages well when interested in the topic but refuses to engage with anything they find boring or tedious", along with anything to do with behavioural and emotional problems.

• Any learning difficulties or developmental delays, any unusual childhood assessments that you underwent even if you don't know what it was measuring or the outcome of it, being put in any remedial classes or alternative education streams.

• Informal statements or reports from the people close to you - friends, partners, family, even managers if you're on good terms with them. Make special note of if certain people have been nagging you about the possibility of being ADHD or a diagnosed ADHDer basically outright telling you "Bro, you got the ADHD - you realise this don't you?". Doesn't need to be a written letter of introduction, but just a collection of impressions from the people around you based on what they have observed. You might consider polling them and asking if they think you might have ADHD and relaying their responses to the doctor.

• Anything that therapists have remarked upon to you that is contributing evidence for possible ADHD.

• (Optional, depends on your relationship with the doctor in question) Your experience with consuming street drugs that are stimulants. This includes MDMA. If possible, pay particular attention to your ability to focus, your level of motivation, and your internal experience of being distracted etc. This can be a little bit dicey because you don't want to come off as drug-seeking but if you have an open-minded doctor or one that knows you well then you're probably alright to level with them about this.

• Similar caveat to the above, make note of any difficulties with addiction or impulse control (binge eating, problematic impulse shopping, gambling, gaming, alcohol and other drugs etc.) even if it's sub-clinical, so for example you might not be a diagnosable sex addict but you know that you compulsively seek sexual gratification in a way that interferes with your relationships or your employment and in a way that is notably outside of what is typical for others.

• How you function without caffeine.

• Your coping strategies, such has having a bag you always carry with you which contains everything you could possibly need - food, an umbrella, spare medication, etc. because otherwise you will be unprepared and you'll forget everything. Or it might be having strategic caches of meds at your parents' house, your partner's house, your work desk etc. because you always forget to take your meds and to bring them with you. Or it might be a complete dependence upon an electronic calendar and alarms to tell you what you're supposed to be doing and when but without this your life would immediately collapse. That sort of thing.

• Spending time thinking about what you were like as a child, especially compared to your peers. This works best if you can talk it through with someone who knew you as a child such as a close school friend or especially a caregiver. Try to piece together if there were any things that you particularly struggled with or where you were behind compared to your peers.

• Developing a holistic understanding of the particular symptoms that make you suspect ADHD and how they present. If you have been diagnosed with major depressive disorder, for example, it can resemble ADHD in a lot of ways but if you can clearly remember struggling with focus and motivation as a persistent theme in your life prior to being depressed, this is crucial info. Or if you struggle with anxiety, do you find that even at home when you are calm and settled that your ability to focus or remember where you put things is still impaired, indicating that your ability to focus cannot be attributed exclusively to the anxiety?

• Write everything down, collate hard copy evidence if you can (an ADHD screening test, medical reports, school reports etc.), and make sure that you take all of this info, including personal experiences and anecdotes, that you've brought together to the doctor so that you don't miss anything. If possible, make something like a bullet point list with prompts for all the critical bits of information you want to present to the doctor so you don't overlook anything and to help keep you on track.

Some words of advice:

• You don't need to get all of this together in order to be prepared for an ADHD assessment. Don't feel like you have to achieve every one of these things above, this is just the example of what someone would have prepared in a perfect world situation. Do your best, don't let the list become a barrier to seeking a diagnosis because it's really just advice and guidelines. Seek support from someone close to you to help you with this if it feels a bit overwhelming.

• Tell your doctor that you asked a peer worker who is diagnosed with ADHD for their advice on how to prepare for an ADHD diagnosis, which is why you are so organised.

• Give the doctor your honest assessment of how difficult it was to get this together and what your experience would be if you didn't have this structure and advice while pursuing an ADHD diagnosis.

• Be prepared for them to want to eliminate other potential causes of ADHD-like symptoms, especially depression and anxiety and bipolar, before they are willing to progress to considering ADHD.

• Know that there are non-stimulant meds that can treat ADHD symptoms so if you come away from your appointment disappointed that instead of an ADHD diagnosis you have a prescription for some antidepressant like venlafaxine or bupropion, keep in mind that your doctor might be using this as a diagnostic probe to get a clearer picture of your symptoms and how you respond to meds. It's best to play ball, unless the doctor really shows a complete lack of interest in even considering ADHD, because they might be approaching an ADHD diagnosis with due caution and skepticism.

• ADHD suffers from a lack of understanding, even amongst psychiatrists, especially in adults with late-diagnosis and if you're AFAB or a person of colour then your experience of ADHD is much more likely to fall outside the stereotyped understanding of ADHD, so you may find yourself pushing shit uphill. That's just how it is and it sucks but be prepared to seek a second opinion or to ask for a referral to specialist doctors or clinics for a more comprehensive ADHD assessment by people who know what they're dealing with when it comes to ADHD.