People have to remember that we don't absorb 100% of the medication sublingually...it is said that it can range between roughly 30% and nearly 70%. One persons absorption rate can differ drastically from another person, even administering the same amount. For example, Herbert could take half a sub, 4mg...and he will let it rest under his tongue for 30 minutes with his tongue slightly raised...then after that he will slam his tongue down for another 15 minutes, and then he will swish the saliva in his mouth gently for about 15 minutes. His absorption rate would be higher than Henry, who will put his half a sub(4mg) under his tongue, and he will massage his tongue downward into the vein for 5-10 minutes, then when its disintegrated he will swallow his saliva.
For about a year, I was Henry. Then after some research and trial and error I transformed into Herbert. I saw a huge difference in the effectiveness and the amount I needed to obtain the same effect. I went from 8mg as Henry down to 4mg as Herbert, without sacrificing anything, simply switching technique.
People underestimate the effectiveness of administration technique, and dont take this into consideration. 4mg given to one person will only translate to barely 1mg absorbed while that same 4mg given to another will be over 2mg absorbed.
*This is why it is never wise to suggest that a certain amount administered such as 4mg+ will block out its own euphoria. Because Henry and Herbert won't be hitting that amount by taking half a sub. Henry would actually need to take an entire sub to absorb about the same amount as Herbert is when Herb takes 4mg.