Vivitrol is available as a monthly injection and is available in only one dose. The recommended dosage is 380 mg and is given as a 4 mL gluteal intramuscular injection, delivering medication continuously over the approved dosing interval. It must be administered by a healthcare professional.
It’s important to note that Vivitrol should only be used in individuals who are already opioid-free for at least 7-14 days, as starting the medication before this can cause withdrawal symptoms.
As with any medication, there can be side effects such as nausea and headaches. Most of the side effects of Vivitrol are minor, while some may not experience any at all. It is important to discuss any concerns with your mental healthcare provider.
A trial of taking oral naltrexone is completed before administration of the first Vivitrol injection to confirm the active ingredient is tolerable. This is often down while waiting for the first injection to arrive from the pharmacy.