Marijuana (a.k.a weed or Ganja or Cannabis) can successfully be treated in both inpatient and outpatient rehab centres. Outpatient treatment centres typically work best for those who are high-functioning addicts. In other words, they can still manage a relatively normal day to day life despite their addiction. Outpatient rehab allows clients to maintain their work and family obligations while attending addiction counselling therapy a few times a week. For those with a more severe addiction, inpatient addiction treatment is usually recommended.