Today when I woke up I took 80 orally IR methylphenidate and after it I snorted 20mg. Later I snorted three or four tablets which I think were IR methylphenidate 20mg but my girlfriend realized that I was snorting tablets 2mg alprazolam. I thought I had only one tablet of methylphenidate but when realized I was snorting alprazolam I realized I had five 20mg IR methylphenidate. Since this I have snort two lines each of 20mg methylphenidate and the effect have been very soft. Can the alprazolam snorted kills methylphenidate effect? Now I have three 20mg IR methylphenidate tablets and I want to save it. When I finish with methylphenidate I will take a dose of 300mg tramadol and 100mg one hour later. Why the nasal doses of 20mg methylphenidate does not produce the effect of ever? Possibly I will snort 40mg at once in two lines of 20mg each and finally snort a line of 20mg. Please, give me advices