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Thank you for waiting, I have been looking up various studies. As you know, the combination of propranolol and Coccaine is not a good one, although most studies were done with propranolol higher dose and IV injections in the Emergency Room. A small amount may be ok if you have to have Propranolol today, perhaps 5 mg twice a day, but it would be best not to take it. As you may know, Cocaine levels peak in the blood about 30 minutes after you take it. But cocaine’s action in and on the body depends upon several factors. Dosage, mode of administration, single vs. multiple use. But in general, cocaine and its metabolites stay in the system and can be detected 2-4 days after use
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It depends on your metabolism and dose of coccaine, it can last up to 4 days after use, but the amount gets smaller and smaller. You may want to try 5 mg in the morning and check your pulse and blood pressure to make sure you are not having any side effects, then try 10 mg in the middle of the day with the same thing, and if ok take 10 mg in the evening again and you should be in the clear.