As long as you actually get primo I think injectable is the better way to go.
Now I am not sure of your goals, but my wife gets better results in the gym on 10 mg of Anavar a day then she does with 50 mg of Primo injected every week. Now on the opposite side of that equation is Primo takes her sex drive through the roof. With all this said my wife is probably older than you at 52 years and is post Menopause.