I'm concerned about taking montek LC for an extended period. Could it have any negative effects on my kidneys, liver, or any other part of my body?

Long-term use of Montek LC (Montelukast and Levocetirizine) is generally considered safe, but may increase the risk of liver enzyme elevation, kidney damage, and other adverse effects, such as increased blood pressure, fatigue, and mood changes; regular monitoring of liver and kidney function, as well as periodic check-ups with your doctor, can help minimize potential risks and ensure safe long-term use.