Instruct: Classify Amazon reviews into positive or negative sentiment
Query: No effect, at least for now

I bought this for my mother after I compared all the Psoriasis products on Amazon. I found Mg 217 Intensive Strength Medicated Tar Ointment for Psoriasis 3.8 Oz having the highest review start number by many people. So I bought it along with the shampoo , and another product by Mg 217.My mother has used them for one moth, but there has been not even a tiny effect. In fact, the symptom has even turned worse, especially when she used the Tar Shampoo. After using this shampoo, she felt the itching and inflammation even got worse.I saw somebody wrote something like "you have to keep using it until there is effect". But how long should one stick to one product? 1 month? 3 months? 1 year?Psoriasis is very hard to be cured, and maybe other people will receive better effects after they use this product, but not for my mom. I gave 1 star for this product so that people after me won't all think it is THAT good.