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In de-addiction programs most difficult step in de-addiction is to have motivation to quit drug and you are motivated. This is a good step in improvement of life. Taking opium for about 1.5 years must have made you dependent to opium so it is not advisable to quit it suddenly, risk of severe withdrawal is there.
Best is to visit a psychiatrist
and take advise but you don't want to take medicines.
-So best in your case is gradually decrease the dose of drug by about 5-10% daily and reach the zero dose in about 2 weeks. But even with gradual tapering you will experience withdrawal symptoms
like irritability, restlessness
, muscle spasms, stomach pains, fatigue, lacrimation, rarely seizures, delirium also. You can take non opioid analgesic
drug for stomach pains and muscle fatigue
- Take coffee 3-4 times a day
- If you develop fever, confusion visit a psychiatrist.
- for relief of anxiety take benzodiazepines like clonazepam, but these drugs are also addictive so take only when needed, don't become dependent on them.
Hope I cleared your doubt.