Final answer:
Sodium Bicarbonate acts as a buffer to neutralize the acidic effects of TCA overdose and restore the acid-base balance in the body.
Step-by-step explanation:
Sodium Bicarbonate works as a treatment for TCA (Tricyclic Antidepressant) overdose by acting as a buffer to neutralize the acidic effects of the drug. TCA overdose can lead to an increase in the concentration of hydrogen ions in the blood, causing acidosis. Sodium Bicarbonate, being a weak base, can react with the excess hydrogen ions to form carbonic acid, which then breaks down into carbon dioxide and water. This reaction helps restore the acid-base balance in the body and can prevent life-threatening complications.