<s>[INST] I have allergy sinus problems. Like itchy nose and eyes, sneezing etc. I was advised by my doctor to have Lmontus for 2 weeks. I had it and stopped. two days later my allersy comes back. Can I have L montus for longer periods...how long can I have it for without causing any side effects? [/INST] Hello.L-montus is a very safe drug. Side effects from it's long-term use are very rare.I have seen patients using it daily for many years also.However, it treats symptoms of allergy, it does not treat the allergy itself. That's why you will need to take it for long time. Wish you the best health.Regards. </s>