Olanzapine is effective with positive symptoms, but has a reputation for causing weight gain and raising blood sugar and lipid levels. Care with diet and exercise and regular doctors visits checking blood pressure and cholesterol levels is a good practice regardless of choice of AP medication. These’s a recent thread discussing this medication at length.
Adaptive measures such as noise canceling headphones or earplugs are becoming more common for people on ADHD and Autism spectrums. I took similar measures on my own in the workplace later in my career, but in my experience noisy and chaotic work environments can take their toll over time. I worked some light industrial jobs months before I was diagnosed, and it was much easier to handle the more quiet lab environment I worked in after diagnosis.
A stable low key environment without significant change of personnel and interaction is generally best. Changes to the work environment and plans are best if gradual and discussed ahead of time. This said, overly dull and repetitive work isn’t always good either. You want enough stimulation to keep the mind occupied, but not so much to tax it with processing sensory inputs, human interactions and unpredictable events.