text: 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). \nThe undesirable effects of methamphetamine use include:\n\nCompulsive fascination with useless repetitive tasks (see Punding) \nSevere psychological addiction \nAcne \nDepression \nFormication (false sensation of flesh crawling with bugs, with possible associated compulsive picking and infected sores) \nAmphetamine psychosis \nErectile dysfunction ("Crystal cock") \nLong-term cognitive impairment due to neurotoxicity \nTooth decay (Due to neglection of hygiene and or chemicals used in manufacture of crystal methamphetamine ("meth mouth") \nDamage to immune system \nPersistent anhedonia with chronic use \nDeath \nStaphylococcus infection \nThe drug can stay in your system between three to four days\n\nCommon side effects of methamphetamine include:\n\nCardiovascular - Hypertension \nEndocrinal - Elevated body temperature \nEye - Dilated pupils \nGastrointestinal - Diarrhea, nausea \nNeuro-psychological - Paranoia, especially when mixed with cannabis. \nNeuro-psychological - Euphoria, followed by depression \nSkin - Rash \nMiscellaneous - Anorexia, insomnia, restlessness, weight loss \nDecrease in Appetite \nSevere side effects (with chronic use) include:\n\nAmphetamine psychosis \nClinical depression \nKidney damage \nLiver damage