zicam?

so im home sick today with a nasty headcold...i have two medications i can use...my vaporizer (which just makes me upbeat and ignore the cough for awhile) and this zicam cold relief throat spray (which tastes horrible)...it says per spray it has 3.3 mg dextromethorphan, so i was basically wondering what would be a good dosage so i wont be trippin hard, but i wont be feeling shitty?
hmm...maybe i could have worded that better? but heres the site for the zicam meds http://www.zicam.com/Product.aspx?eid=5

You know the phrase "use as directed"? That's always a good plan. Notice another mod helped fix your title so you could keep this thread up, GhettoBlunt. I'd be very hesitant about further use of the word "trippin" if I were you.

sorry...i havent really been on here much lately but i remember people talking about "trippin" a lot before...i didnt realize it wasnt allowed. the only reason i mentioned it was because if people end up doing this, it will at least be safer and less risky...sorry for the slip up