Welcome to HCM
You used cocaine in heavy doses for 6 moths and then after quitting it you started on methadone
. Now you have problem of nose. See some symptoms of drug withdrawal remain for long time even years after quitting. The problem of nasal stuffiness, scabbing you are having are due to withdrawal features. These are also labelled as Protracted Withdrawal. I would advise you to keep nasal mucosa moist by sprays. Also for rhinitis
and congestion you can use some non sedating antihistaminic drug like levocetrizine or fexofenadine
etc. These will help to remove congestion and will give you symptomatic relief.
Dr. Seikhoo Bishnoi