The single injection would be with Evenity as one dose is two injections.
I'll mention without trying to convince you that the headaches with Tymlos and Forteo can be avoided. They are caused by vasodilation of the blood vessels. Salt before injecting to constrict the vessels as well as a glass of water to increase the fluid to expansion ratio can alleviate the headache.
You might fare better with Zometa. It is zoledronate like Reclast with different dosing parameters.
There probably isn't a code for lower dosage of Reclast. The endocrinology office has to handle this. I hope your prescriber is flexible.
@windyshores your assistance is requested