I wanted to try to make a topical from dutasteride capsules but when I just cut capsules in half and then pour a little bit of that liquid on my tounge and it starts to pinch my tounge very strongly. Then I found that dutasteride capsules contain butylated hydroxytoluene which is probably guilty for pinch effect. I dont try on my skin because I was afraid that its start to pinch my skin also but I now I see that it is used in some cosmetics so maybe it isnt so bad for skin as for your tongue.