by "tea" you mean ground up cactus, boiled in water for a while? it's pretty foul, syruppy is the least of your worries. there's a lot of fiber, fats, proteins and waxes in cacti that are making your syrup.
if you manage to drink it down, you'll probably vomit and then have a nice trip.
if i was you, i'd poke around the hyperweb for a mescaline extraction method. it's easy and it works. instead a cup full of nastiness, you'd ingest 250-500mg of a mescaline salt powder.
i've done it.