Yes. I didn't find the pill very effective, but I never had the problem with withdrawal and I didn't have the allergic reaction I have with the injection. I wasn't on the pill very long so if the two really are the same, I probably would've had the same reaction on it eventually. If you've been on the pill for a while with no issues regarding side effects or allergies, you'll probably do okay on the injection. I wouldn't switch though unless you frequently miss/skip doses for one reason or another just because it's a four week injection but it doesn't even last three weeks for a lot of people.