Can 1% nizoral shampoo trigger a shed of small 1-2cm hairs? Or is it more likely from lowering fin dosage and thus permanent?

I have been on oral minoxidil since August ‘21 to treat diagnoses of AGA and telegenic effluvium. I started at 2.5mg daily and switched to 5 in January. I also started 1mg finasteride daily in January, which I lowered to .5mg EOD in March because of side effects. In the past two weeks or so, I’ve been shedding small 1-2cm hairs. Discouraged by a shed since I feel I’ve made no progress since August. Only recent change I’ve made was starting Nizoral once a week a month ago to improve scalp health