Do not take it orally.. He is right about the other chemicals and they're dangers, i coulden't even tell you what they would do combined with a potentiating MAOI. I remember reading some horror stories, and sleepy grass is 100% hit or miss, i assume you are collecting wild samples and unless through previous experimentation (chroma or just self guini pig) its absolutely impossible to know what shit storm you might be getting into. Something to greatly reduce risk *REDUCE RISK* is freebaseing the extraction. A quick google search will net you a few acid-base extraction methods using simple chemicals found anywhere..
Like i said though, i had access to wild grass and after much reading, it seemed not worth the effort and materials because it was a dice roll and much greater consiquences where also thrown in there rather then just a tummy ache and ruined afternoon.
Save up some cash, order some prime materials, I belive mimosa is the way, mimosa hostilis? (sp?)
look up a simple extract using that, hell from what i have read, almost any fool that can follow directions can grow himself some nice DMT CRYSTALS.
and without the risk of those nasty chems that have been reported in the grass.
Keep in mind you can make poison from edible things in your grocery store, your walking into uncharted territory here with barely a merit badge in chemistry..