Can i use ambien fade cream containing 2% hydroquinone in the morning and deriva c at nights?

Yes, but you will get better results if you use the hydroquinone twice a day . You can apply it after the Vitamin C at night. The most important step that you’re missing, is to wear a sunblock with Zinc oxide everyday in the mornings. Apply it on top of the Hydroquinone and if going out, wear a wide brimmed hat and seek the shadow. Once you’re clear, don’t stop the Sunblock or the vit.C