A question about delayed onset hives (only before bed or shortly after waking) a year after starting use of hair loss drugs topically applied to the scalp.
Is topical dutasteride / finasteride known to potentially start causing hives a year after starting treatment?
Strange thing is not only is the hives not on my head where I'm applying dutasteride topically, but it didn't start until nearly a year after starting use. (Is this because topical dutasteride takes longer to build up systemically in the bloodstream than oral? Still a long time.)
But, I had never experienced hives in my life before and I'm in my mid 40s, so I'm apt to think dutasteride is a cause. It goes away quickly and generally has a trigger that's considered common like heat from a heated blanket, pressure from a bunched up sleeve or intense stress. This ONLY happens shortly before bed or after waking; it never happens mid-day.
I'm aware dutasteride and finasteride can cause hives, but not sure what I described sounds definitely drug induced due to the triggers and the fleeting symptoms.
It seems possible that after I tried Rosemary on my scalp, a natural remedy presumably more gentle, it came back again after going away from stopping dutasteride use. Anyone have experience or thoughts on this?
Thanks.