I highly doubt 10 mgs of methamphetamine would induce psychosis....for me, and people I know, the psychosis tends to become present at around 200 mgs of IV shard of good purity, probably contains 150+ mgs of actual methamphetamine. Or with repeated lower doses (50 mgs IV) over several hours/days with no sleep.
Even in a amphetamine naive individuals, I highly doubt 10 mgs would induce much euphoria/mania let alone psychosis.I had some illicit racemic amphetamine powder which when my friend sent it away for analysis it came back as a total of 98% amphetamine salts, and 100 mgs of this could be used nasally or IV with no signs of psychosis whatsoever.thats not to say it's safe, but 10 mgs of the stuff I'm referring to would have been quite subtle if felt at all.
Ud either have to be either a) extremely sensitive to amphetamine/cathinones etc or b)suffering from underlying psychological issues.
Sorry to go off topic, I wanted to clear that up, to me misinformation is possibly harmful.( not in this case but u never know)