alright so i tried it, and it seemd to last a little longer than normal, also the come up was alot faster. i took one bottle of zicam and 100mg of vit c and vit b, and 500 mg niacin. the come up was about 30 min (for me zicam usually hits in about 45min - 1hr) th trip lasted about 4 hours, at which point i walked down to the sotre and bouth another bottle of zicam. back at the house i took that bottle and withing 10 min i was back to tripping, trip lasted about another 4 hours. next day, very little hangover, just a little spacey feeling, easy to move, concentrate and function. also must note i drank a bottle of water every hour. in the end the experiance went from 330 pm to 1100ish and i proply feel asleep at 1200. I usually dose DXM with vit c and b but it was deff a stronger trip with the niacin. thanks for everyones help. and thanks for listening.