https://addictiontreatments101.com/ How Does Fentanyl Affect The Body

Fentanyl works in your brain to change how your body feels and responds to pain. Constipation is a very common side effect of fentanyl and other opioid medications. It’s unlikely to go away without treatment. After your first dose and when your doctor increases your doses of fentanyl, you may have a drop in blood pressure. Your doctor may have you check your blood pressure during these periods.

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