When assessing a conscious patient who overdosed on a drug, you should first determine: ?

When assessing a conscious patient who overdosed on a drug, you should first determine the type of medication ingested.
First of all you need to see what pills or actual drugs this person used so as to see how dangerous the situation is. Based on the medication they overdosed on, you will know what to do next, because not all medications are harmful, but on the other hand, some can be deadly. 

20 times a minute is usually the average respritory rate of an adult. additionally the patient is breathing on his own, is clearly maintaining his airway, and is intaking a sufficient amount of air. you shouldn't use a bag valve mask, cpap, or other form of positive pressure ventilation, unless the patient has lost control of his airway, and is not breathing (apneic) or has rapid breathing or slow and shallow respirations. this patient would most likely and should be put on an non-rebreather mask or nrb attached to 100% high flow oxygen at 15 l/min. don't use a nasal cannula, as the amount of oxygen it provides is limited with a rate of 6 l/min.