My grandmother has been taking Montek LC for about three months now because she started having a mild cough after her cardiac surgery, due to pleural effusion. I'm just a bit worried about whether there might be any side effects from using this medication for such a long period. Also, can it affect her kidneys in any way?

Montek LC, which combines montelukast and levocetirizine, is generally safe for long-term use, but prolonged use can sometimes cause mild side effects like dry mouth, drowsiness, or dizziness. It is not typically harsh on the kidneys, but it's important to monitor kidney function, especially in older adults, during extended use. Regular follow-ups with her doctor would be helpful.