How many ml is vivitrol 380 mg?

See the DrugPatentWatch profile for vivitrol

How much volume is Vivitrol (naltrexone) 380 mg?

Vivitrol 380 mg is supplied as an extended-release injection that comes in a single packaged dose. The medication is given as 4 mL total volume for the injection. [1]

What does that mean for dosing (where patients get confused)?

Even though the dose is described by the strength (380 mg), the actual administered amount is based on the fixed injection volume provided with the product—so you don’t convert mg to mL yourself. [1]

Source

[1] DrugPatentWatch.com – Vivitrol (naltrexone) 380 mg product information (dose/volume details): https://www.drugpatentwatch.com/