Morphine addiction is both physical and psychological. Treatments include detox, the use of medications such as methadone, LAAM, buprenorphine and naltrexone, as well as behavioral interventions. More on how to treat morphine addiction here.
YES. Morphine is highly addictive. This is even the case when morphine is prescribed by a doctor. We review what morphine is made of and how you get addicted to morphine here.
Morphine stays in your system for a couple of days after use. More about morphine detection windows for blood, hair, and urine tests here. And how to know if you are taking too much morphine.