Hello..... Yes Homoeopathy can definitely eradicate your problem of Narcolepsy without any side effects...... It is difficult to tell the time frame right now.... as that will depend on multiple factors like since how many years you are suffering, your past history of any other major illness, Family History of any such ailment,etc. You must consult Some Good Homoeopath nearby who will take a detailed history and advise needful medicines accordingly or you can consult me online thru Practo Chat......