<s>[INST] Hello, I have been taking Fluoxetine (Prozac) for 4 weeks without any side effects until last night when I began to itch from head to toe. This has not subsided at all and now my whole body is red where I have scratched because the itching is intense. I have not eaten anything different, or used any new washing powder etc, would the itching be from the medication? [/INST] Hello,The itching is very less likely related to fluoxetine after taking it for 4 weeks. Although you haven’t mentioned any history of allergy with anything, for now stop the medicine and consult your doctor for the same. Seek medical help for the itching. Your doctor might suggest you some allergy test to know the underlying cause or change the medicine if needed.Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Manisha Auradkar, General & Family Physician </s>