text: i shot  crystal meth for days i did sleep 5 hours a night  today i did some and i feel real bad short of b? i know dont use but i did so dont say nothing if it aint to help!! methamphetamine is reported to attack the immune system, resulting in increased susceptibility to a variety of opportunistic infections (including mrsa, streptococcus, pseudomonads, and other bacterias and yeasts).  the undesirable effects of methamphetamine use include:  compulsive fascination with useless repetitive tasks (see punding)  severe psychological addiction  acne  depression  formication (false sensation of flesh crawling with bugs, with possible associated compulsive picking and infected sores)  amphetamine psychosis  erectile dysfunction ("crystal cock")  long-term cognitive impairment due to neurotoxicity  tooth decay (due to neglection of hygiene and or chemicals used in manufacture of crystal methamphetamine ("meth mouth")  damage to immune system  persistent anhedonia with chronic use  death  staphylococcus infection  the drug can stay in your system between three to four days  common side effects of methamphetamine include:  cardiovascular - hypertension  endocrinal - elevated body temperature  eye - dilated pupils  gastrointestinal - diarrhea, nausea  neuro-psychological - paranoia, especially when mixed with cannabis.  neuro-psychological - euphoria, followed by depression  skin - rash  miscellaneous - anorexia, insomnia, restlessness, weight loss  decrease in appetite  severe side effects (with chronic use) include:  amphetamine psychosis  clinical depression  kidney damage  liver damage