Those ones that you provide don't work.
Give a try to this one:
http://www.herbalhighs.com/Item/Skunk_35g.aspx
Bloody works

The only downhill shot last 30min-60min
http://www.herbalhighs.com/Item/Spice_Gold_3g.aspx
This one is also good not to strong like the first but last much more longer (several hours) The first-two hit will blast your panties but after that you will easly build a tolerance.
Those two where the only legal herbal highs that actually got effect