I posted this on another thread but may apply here as well
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Let's confuse things even more. In Japan a weekly administration of a higher dosage of Forteo has been approved. 56 mcg is taken rather than the normal 140 mcg without loss of efficacy if I read the article correctly.

You can find even more articles by searching for teriparatide Japan weekly
https://pubmed.ncbi.nlm.nih.gov/35398293/
A summary of the article.
"It has been found that extending the interval between teriparatide administrations enables bone formation without increasing bone resorption, and a formulation with a weekly dose of 56.5 μg has already been developed in Japan, having been available for use since 2011."