sleepiness and increased hunger

 difficulty keeping track of time, impaired or reduced short-term memory

 reduced ability to perform tasks requiring concentration and coordination, such as driving a car

 increased heart rate

 potential cardiac dangers for those with preexisting heart disease

 bloodshot eyes

 decreased social inhibitions

 risk of paranoia, hallucinations, intense anxiety

 increased risk of chronic pulmonary disorders, including cancer

 decrease in testosterone levels for men

 increased in testosterone levels for women

 lower sperm counts and difficulty having children in men

 increased risk of infertility in women

 diminished or extinguished sexual pleasure

 psychological dependence requiring more of the drug to get the same effect

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