Which of the following is not a common side effect of medications for skin disorders?

Loss of hair is not a common side effect associated with most topical or systemic medications used for treating skin disorders. While various medications can indeed cause hair loss, it is typically not a direct or frequent side effect of treatments specifically targeting skin conditions such as ointments, creams, or oral agents formulated for dermatological issues.

In contrast, itching, dryness, and rash are common side effects of many medications for skin disorders. For instance, some topical corticosteroids can cause skin irritation or dryness as they promote the turnover of skin cells, leading to potential dryness during treatment. Furthermore, many medications can provoke localized or generalized itching due to their effects on skin tissue. Rashes can also occur as a direct skin response to medications, whether due to irritation or as an allergic reaction. Each of these side effects is more frequently observed and documented in relation to the pharmacological treatment of skin conditions.