Which is most affordable: androgel, axiron, fortesta, or testim?

It depends: Entirely upon your insurance plan. Check w/your pharmacy and ask about co-pay cards and other plans as well.

Transdermal testoste: All preprations you talk about are applied to skin and fairly costly cost is slight different with incentives and insurance reimbursement otherwise comparable cost injectable is much cheaper but has drawbackslike high peaks and lower nadir.