It may not be the Albendazole anyway. I took it for years and never lost hair. It was only when I added Biotin to my supplements that my hair started falling out. When I researched Biotin I found that small doses were OK for hair but studies showed higher doses caused hair to fall out. Needless to say that stuff went in the trash. There is lots of mixed evidence on the web. I obviously wish I had dug deeper than 3 sources about the biotin.
But, Matt is right. I do as he says and only use low dose Albendazole.