Please don't try to get high from anti-histamines. They will not get you high but may make you delirious, this is not fun in any way. I see you are 14 and therefore probably live with your parents. They will catch you if you do this. It is quite hard to hide the fact that you are talking to imaginary people and acting very strangely.
Not to mention that people well disappear on you and youd think you are holding something but your really holding something totally different... Bottle cap = Keys for me...
delirous in what way? like, a seeing-things-but-its-all-good way? or a hearing-voices-and-cant-see way?