You'll waste your money on the inclusion of oral oxytocin. If it survives your gastrointestinal tract intact, whatever reaches systemic circulation will be degraded long before it crosses your BBB.
Intranasal has a better efficacy of delivery– distribution. Even then, it's very short-lived. It's an overhyped nonapeptide that works well in murine models.
This topic has been hit on several times over the years. I've used intranasal oxytocin a few times with no positive outcomes. My wife the same. I believe
@Big A wasn't seemingly impressed with it either.
It purportedly has some literature denoting positive net effects on skeletal muscle regeneration. Never used it for that purpose either– those murine models seemingly transformed enough to publish some literature on it.
The D1/2 agonists might fare you well? Never had the desire to dabble with it.