Overdose Scenario

You are called to a 26-year-old male who has taken an overdose of their anti-depressant medication. The mother has called concerned as they have taken overdoses before after periods of low mental health. The call is graded lower priority so unfortunately you arrive 6 hours after the initial call. On arrival you find the patient alert and orientated but seems restless and agitated. The patient is quite withdrawn and not wanting to speak to anyone, so you start an assessment and try to build rapport with help of the mother. 

Initial observations include 105HR, 18 RR, 98% Sp02, 127/75 BP, 37.8 Temp, 5.4 BM.