As long as you deserve
yes they give you a excasty effect and you start to trip out i usually take 4 wait for the high to kick in then when it starts to go down you take 2 then wait and do the same until you consumed 10 it's a better high trust me
They usually last up to 6 to 8 hours depending on the roll.If you get fake rolls called pipes then you may hope that the trip only lasts 1 hour because you will feel paranoid and want to kill yourself.So as long as you do not buy transformers or yellow Mario stars the trip will last at least 6 hours and it goes by really fast,time flys when your having fun haha