SIR, i am suffering with dust allergic problems. dr. sujjested MONTEMAC-L. But the problem is when i stop taking the tablet again my nose irritates, it flows and congesses.i m having bussiness on main road, so,there is allways dust problem.I am also suffering frequently head ache(parcial).So, please kindly suggest me that can i use MONTEMAC-L daily i.e.,contenuously or change the drug .The dosage priscribed by my Dr. is only one tablet at night by bed time.