You have convince him and tell him that doctor will not take medication off immediately as it will cause withdrawal symptoms.
He will taper dose slowly.
Withdrawal symptoms can be fatal.
YOu can show him our conversation and convince him to visit doctor.
Explain him overdose can be fatal It can cause extreme drowsiness, confusion, muscle weakness, fainting, or coma.
Common side effects are clumsiness, dizziness, sleepiness, unsteadiness, weakness, amnesia
, insomnia, agitation, disorientation, depression, headache, visual problems, nausea, abdominal discomfort, drowsiness, blurred vision, tachycardia, weakness, disinhibition etc.
He can develop amnesia (decreased or lack of recall of events during period of drug action), irrational behavior, leukopenia, both elevation and lowering of blood sugar levels.
On long term he can become addict and this will decrease his thinking and mental abilities and decrease memory.
PLEASE FEEL FREE IF YOU HAVE ANY MORE QUESTION OR DOUBTS REGARDING THIS ISSUE.