Can azelaic acid darken skin. Not dark!

Doctor, i had a question so I have been using azelaic acid for my acne issues which I have been dealing with for 2 years so a friend of mine had suggested me to use aziderm 10% ( azelaic acid ) which is the otc percentage so i have been using this for 1.5 months and it  has worked really well for my acne it prevents acne and it helps in Healing pimple really quickly but I have noticed that it is making my face darker i don't know how's that possible because it even tones skin and reduce pigmentation but I feel like it's darkening my skin also i go out in the sun three four times a day but just for 3-4 minutes so 15 minutes in sun daily , i just wanna could it make my skin darker any way or is it something else btw i am not really fair i have a slight fair colour not dark