Generally, TB drugs do not cause swelling of the feet. Side effects vary from one TB drug to another. Some common side effects are gastrointestinal reactions such as nausea, vomiting, abdominal pain, diarrhea, and liver damage. So TB medicines do not usually cause swollen feet. The causes of foot edema are many, commonly caused by renal insufficiency, cardiac insufficiency, cirrhosis or hypoproteinemia due to severe malnutrition, and some patients may also have foot edema after taking antihypertensive drugs, especially calcium antagonists such as nifedipine. Therefore, once you find foot edema, you should go to the hospital in time, the doctor will clarify the cause of the disease through the relevant examination, and according to the specific circumstances of the targeted treatment, so as to achieve a better therapeutic effect.