The common side effect of corticosteroids, which are used in treatment to prevent transplant rejection and in chemotherapy treatment for cancer, is

Corticosteroids, used in treatments to prevent transplant rejection and in chemotherapy for cancer, can have several common side effects. These include:

1. Weight Gain: Corticosteroids can cause an increase in appetite, leading to weight gain.

2. Mood Changes: These drugs can cause mood swings, anxiety, and depression.

3. Insomnia: Difficulty in sleeping is another common side effect.

4. Increased Blood Sugar Levels: Corticosteroids can raise blood sugar levels, which can be a concern for people with diabetes.

5. Osteoporosis: Long-term use of corticosteroids can lead to bone loss, making fractures more likely.

6. Increased Risk of Infection: These drugs suppress the immune system, making the body more susceptible to infections.

7. Changes in Appearance: Some people may experience changes in their appearance, such as puffiness in the face, acne, and stretch marks on the skin.

Remember, not everyone who takes corticosteroids will experience these side effects. It's also important to note that the benefits of these drugs often outweigh their potential risks, especially in serious conditions like transplant rejection and cancer.