leeosteo.
I take the shot in the uppermost part of my thigh. I always sit down recommended because the low blood pressure starts within a minute of the injection. I only know because I dilligently used a blood pressure cuff for the first month. And because my blood pressure is already low.
The low blood pressure happens because pth causes vascular dilation. It begins to resolve as soon as it starts, but can take several hours. Don't plan on using the balance bars or anything else that requires balance for safety.
Some patients get headaches as a direct result of the vascular dilation. Two things counteract that mechanism fluids and salty foods. It's a great excuse to eat something a little salty.

I take vitamin k2 around two hours before I take calcium. I want the k in the bloodstream when the calcium arrives and I want the calcium in the bloodstream when the Forteo arrives.
This could be a flaw in my (over)thinking. And might not even be helpful.
I started with the injection in the morning and waited for a reaction. Never felt anything. In the beginning I'd pinch the skin and then let go, so as to avoid bruising. You might look to avoid any little surface vessel that might bleed, also to avoid those little polka dot bruises.
If you have any dizziness, best to take the injection at night to avoid any falling.
I never got a headach or any dizziness or anything negative.
These needles are so tiny. You'll laugh.
Oh, I hope you have luck. Let us know tomorrow.