Topical min/fin for 8 months. Still seeing continuous miniaturisation

So its now been 8 months since I began topical fin treatment, but large areas around my temples have experienced miniaturization. The hair is not just shedding. Thick hairs are being replaced by new thinner ones.
When is it time to call it quits and look for other solutions? There is definite hair loss progression going on, not just a fin shed. Is it still possible for the treatment to start working?

Are you microneedling? The tricky thing with hair loss is that the medication might be slowing down the progression, and stopping will greatly accelerate the loss.