Hey, I am also in NL and have used both Vyvanse and Tentin. (Tentin acts faster but lasts less time.)

My metabolism works through medication very fast, and at one time my daily dose of Vyvanse , cleared with my psychiatrist, was 70mg two times a day. This works out to the same dose of Tentin I would take.

I’ve found that if I’m better rested, and my diet is good avoiding alcohol, sugar and caffeine, I don’t need the second 70mg and I haven’t in about a year. (Although I have taken 2x70mg doses in the morning by accident. That was uncomfortable for about two hours then pretty normal. You def should not do that.)

The best thing I’ve found, but you prob won’t get much support for this unless it’s from a prescribing psych, is to have a small amount of Tentin with the Vyvanse prescription. In that case, you can just take a 5mg ‘booster’ when you feel the Vyvanse wearing off.

Other things you can do instead are eating something healthy, going for a walk, and maybe a little coffee but that’s different for everyone.