Hi, It is to be remembered that withdrawal symptom(s) depend upon the type of drug abuse, method of abuse, amount taken each time, medical and mental factors and for the length of addiction to the drug, in your case the culprit is cocaine thus the symptoms of dizziness, depression, and restlessness will last from a week to 10 weeks, because you have taken it for 4 months thus it will take another 2-3 months to clear from your blood circulation (unless you take it again), since continue abuse of drug(s) interfere with self motivation resulting in drug dependence and cravings, and once dependence develops withdrawal symptoms will start when the substance is removed. - presently there are no medications approved by the US Food and Drug Administration to treat cocaine addiction, so presently behavioral interventions, one being contingency management (CM), also called motivational incentives program is showing positive results. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Munish Sood, Ayurveda Specialist