Question about BP and switching meds.

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Hey guys,

I have used Clindoxyl for almost a year and it worked for me alot.My doctor only gave me 3 refills and last week I have used my last bottle.The thing is my aunt got some Epiduo and gave me some.I have not used it yet because I am using Differin and Clindoxyl instead.I understand that both Clindoxyl and Epiduo has BP.So I was wondering since I ran out of Clindoxyl,can I replace it instead with Epiduo?So I don't have to go to the doctor to ask for more?Also will it break me out?Since its still BP but a different brand.