It really depends on the concentration. I've seen anywhere between 10mg/mL and 40mg/mL. So if your vial is 10mg/mL, you'd only be getting 1.2mg/week which does seem pretty low to me. If your vial is 40mg/mL then your weekly dose would be 4.8mg which seems more reasonable. Really though it all depends on how your levels are, when was your last blood test?