Minoxidil not working at all

As the title says, is it possible that minoxidil doesnt work at all ? I use 5% topical minoxidil since 5 months and I don’t see regrowth at all… I put it religiously every night on my hairline and temples (~3/4 sprayings) and I only notice very light peach fuzz which I think will never grow into terminal hair… Should I try spiro ? My hairline is so bald I Don’t even know if it is possible to grow hair anymore. I feel so bad and desperate