How long does it take for morphine injections given for chest pain to get out of the system?
It depends on the dosage given and the patient’s morphine tolerance level (previous exposure/use of morphine or morphine derivatives). Generally however, most are only effective for about 4-6 hours. The rate of dissipation from the body is totally dependent on the patient as well, i.e., the patient’s kidney function. Usually though within 48-72 hours most or all of it is gone. Again though, it depends on the dose and the patient – everyone is different, and you cannot rely on averages – they’re simply guidelines.
