How do I discontinue taking Naltrexone?

I had to stop it when I was getting a breast biopsy and had to take percocet for my fibro pain. I called the pharmacist and he said there was no problem stopping it. It gets out of your system quickly. I'm on the 4.5 mg at night.

You should not stop any medication without your doctors advice, however naltrexone does not cause physical dependence, so there should be no problem with just stopping it.