Hello
At the night your friend do a variety of things with full consciousness but upon waking forget everything.
This is a main problem even at the age of 16 years .
He is taking "prozac" i.e.
FLUOXETINE .
The side effects of prozac are
nervousness , insomnia , anxiety , headache , tremor
drowsiness , seizures , MANIA , vomiting, sweating , dry mouth, hyponateremia etc .
In your friend case at least one thing I can say that this temporary loss of memory ( amnesia ) is not a side effect of prozac ( so I mentioned in detail side effects of prozac) .
In my so many patients I have noted that after taking of this drug so many complaints that they are feeling
lightheadedness , fullness in
epigastrium and increase in appetite but fullness in stomach .
Due to anxiety of nervousness your friend may have behaving like this .
In my opinion decrease the dose of prozac 1/2 than at present he is taking . If no relief then consult your treating doctor and get his opinion.
Hope this will help you.