my son has tonsils problem so had difficulty in breathing but now it has reduced and he can breath closing his mouth when he sleeps. he was using nasal spray and allercet M for past 2 months. but now still can I continue with allercet M 5ml for my 6 years 6 months old boy at night since he opened his mouth to breath last night as I didn't give him allercet m last night because I finished it giving for past 2 months.