unless your dead set on drinking cough syrup, just get some robitussin cough gels. theres 20 in a bottle. just taken them all. it will equal 300mgs of dxm which is good for a first trip. but if you want syrup, id suggest drinking a 3oz bottle of delsym, which doesnt taste too bad. it comes in either grape or orange flavor. theres also some cvs brand grape cough syrup thats supposed to taste good but i dont know the full details on it, and have never used it. i use robo gels or delsym.
the generic CVS tussin that comes in the blue box tastes like ass. not too thick but nasty. Of course the namebrand is pretty sick as well. I've started noticing the CVSs over here carrying the generic in a blue box and having seemingly the same product in different packaging right next to it. Same ingredients but the box looks more like the namebrand robitussin and I tried it and thought it tasted better. Comes in 8oz. too. And for your first time around 4OZ of syrup would be good, or 20 gels if your gonna take the pills.