This is recommended for those who have severe acne. But you need prescription for this one. Luckily, I have not experienced severe irritation. No purging as of now. No redness. No sting. Light itchiness and peeling on affected areas only. Although it differs to everyone. I attribute this to the previous prduct i used, Ryx Skin's starter kit and clear bomb kit. I guess my skin built its tolerance from there. I'm only on my 10th day and yet it has already dried my recurring hormonal acne (due to hyperthyroidism). Use gel if you have oily skin. If you have dry skin, cream is better.
1st photo is before Differin, 2nd photo taken today.