I think you should take serious note of advice and recommendations given by " Cotcha" and " hotgirls.jpg.."
You present with somatic symptom disorder combined with hypersensitivity to Minor slights.
Vyvanse is a very good med for ADD but you need an SSRI to balance out your obsessions and constant worry.You present with debilitating OCD and I don't want to see you getting worse. Do not focus on the 1/10,000 chances or Steven Johnson syndrome etc.. If something is very probable to help you, pursue it! Otherwise if you're wanting guarantee's you're going to lock up all your options and your OCD will continue to get worse! I suggest a trial of Memantine to quiet down the OCD and calm the negative ruminating loops. Start with 5mgs and work your way up every week until you reach robust symptom mitigation. It doesn't help everyone but It's pretty damn close to being devoid of any adverse effects. It can also lower your tolerance to stims ie) vyvanse and you can lower or maintain the lowest possible dosage.
How much are you taking , 20-40 mgs? Highly unlikely to cause Serotonin Syndrome...approaching Zero !
You can't even see yourself because of how smothered and bombarded you are with negative thoughts or convincing yourself that what you cannot do or don't learn overnight that most of the populus Can ! That's BS You're very observant, you retain information well and you type your posts in a concise, proper order. You're pretty articulate and you list with incredible detail. Too much can stop you functioning in a timely progression with most tasks in life because you think you must be perfect or you've failed. Wrong.
90% of us have forgotten 80+ % of what we've learned in school, unless we continue using it in advanced education or as everyday knowledge that we apply for work or consistent daily tasks! You are not the minority, what you explained is totally natural !
How old are you btw?
You overwhelm yourself on a daily basis and you're psyche/condition is giving you this unrealistic idea that you should be able to pick up any book, skip to the final chapters and understand everything thoroughly. No way by anybody ! Chemistry is not easy by any stretch, particularly Organic. Are you recently read in the basics ? Take small steps.
I know for a fact that you're very capable of learning. It was very true what was mentioned, all psyche drugs can prevent you from being 95% razor sharp and witty but if you need it as opposed to falling crippled to anxiety or OCD, then the compromise is not your fault and is necessary.
When did you play chess last ? I held a masters rating when I was 22 and if you do not play frequent and consistent you will not catch on that easily. Your ability to visualize and think 4-8 moves ahead relies on calm focus and deep concentration but more importantly, the familiar scenario of pieces and where the co-responding openings and vulnerabilities present you with a winning attack plan. This is recognized as being familiar quicker and more clearer after thousands of games/matches. Not a few dozen, thousands!
The Neurorad ..skimmed through your MRI because he was in that " all too familiar chess piece area" There were NO alarming triggers. You have a small Arachnoid Cyst that was probably missed by the previous Radiologist OR is growing very slowly. These are incidental and Benign unless there is mass effect or compression on communicating CSF.
He's Not concerned because with yours, there is NO threat or danger. Pineal cycts are fairly common and harmless as well . Protocol is to repeat MRI every 8-12 mos to check on growth and tissue compression.
You are right regarding 2D6 hijacking . Start low and slow, if Heart rate and Blood pressure is not affected you'll be fine to increase etc.If rapid increases occur, be sure to have cyproheptadine and benzo's on hand. Thousands of people take Prozac/Amp etc . Very few cases of SS are presented in literature as a result.
If you're fine with Lexapro and Amp/Vyvanse then I wouldn't worry about 2D6 competition .
Just remember that Lamotrigine and Topiramate especially can wreak Havoc with your short term memory.
Please give yourself a fair trial of Memantine or zoloft -up to 200mgs/day for your OCD and to Minimize your Thalamic-Striatal Hyperexitability.
Best.