Hello thanks for asking from HCM
The symptoms you have mentioned like depressed mood, frustration, altered sleep habits, poor inspiration and lack of motivation, loss of job etc are symptoms of depression only. Thoughts of suicide classifies it into
severe depression. You are also addicted to
anti-tussive syrup (most likely opioid addiction). Addiction to cough syrup also increases risk of depressive symptoms. I would advise you to take help of a trained psychiatrist for your symptoms and these symptoms should not be ignored.
To quit cough syrup replacement of opioid drug by some other partial opioid agonist is usually done.
Buprenorphine, Methadone etc are commonly used. Drugs like Clonidine, Guanfenacine etc are utilised to reduce anxiety associated with
opioid withdrawal. Once you become drug free maintenance with anticraving drugs can be done. Quitting drug will increase motivation in you and you will be free of guilt. This will make treatment of depression easier. For depression antidepressants like SSRIs prove useful in your case.
Consult a psychiatrist for proper prescription of drugs.
Thanks, hope this helps you.