<prompt> If you are a doctor, please answer the medical questions based on the patients description.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 acheparcial.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.  <response>: Hello popular autoskim, allergy to dust, with headache may be due to rhinitis or sinusitis, contuse same medication once daily X-RAY PNS if sinusitis need antibiotic needle puncture of sinus, advice to protect your self by, avoid dust exposure, use mask put over mouth nose, try immunotherapy -by intravenous injection or sub lingual avoid alcohol smoking, YOGA, deep breathing, relaxing exercise. Hope you will enjoy positive health, thank you. 