Can you use Tretinoin with Azelaic Acid?, The answer is a definite YES as both of these ingredients work synergistically and are even more effective when used together!, Thats why youll see How to Use Hydroquinone and Tretinoin Together How to layer tretinoin with other skincare ingredients safely This Tretinoin Skin Care Routine Is Key to Calm Skin When Using Retinoids Vogue What to Pair and Avoid with Glutathione