According to the sources provided, itching is a possible side effect of Cozaar (losartan). The first source, Drug Patent Watch [1], does not mention itching as a side effect, but the second and third sources, Mayo Clinic [2] and Medical News Today [3], both list itching as a potential side effect of Cozaar. Itching is classified as a less common side effect, which means that it occurs in between 1% and 10% of people taking the medication. Other less common side effects of Cozaar include back pain, muscle cramps, and diarrhea. It is important to note that not everyone who takes Cozaar will experience side effects, and some people may experience different side effects than others. If you are taking Cozaar and experience itching or any other side effects, you should talk to your doctor or pharmacist to determine the best course of action.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/COZAAR
[2] https://www.mayoclinic.org/drugs-supplements/losartan-oral-route/side-effects/drg-20067341
[3] https://www.medicalnewstoday.com/articles/drugs-losartan-side-effects