Is 20 mg Melatonin safe what is the highest dose can you take?

I am taking 25 mg now for the last few days but doctor says its too much I told him I tried.low doses before but stop working. I am also taking 50 mg trazodone too. Doctor say if a low dose doesn't work then not to take it but I found 25 mg works for me.

Ok... so 25 mg is beyond the max dose.
I used to take it but became tolerant really quickly.
Your Trazadone is at a low dose. I started out and that dose but also became tolerant wishing a month.
I've been on 100mg which has kept me for 6 months.
I also take Ambien 10mg.
Sleep is essential for having a balanced body. I changed my Primary because I kept complaining for years about it and she didn't put importance on it until I developed another disease.
Don't let that happen to you!
If something is not working then don't wait for the next appointment.
Call his office!
I also found that Flexeril helps with my pain syndrome and helps me get tired in the evening. I only take it once a day at most.
I don't know if your insomniac is related to pain. If it is the need for better pain management is in order.
It's a matter of using good sleep habits, not worrying if you are going to sleep or for how long and the correct dosage.
Good luck !
:-)

I saw my psychiatrist on March 9 and the appointment didn't work out so I now have to get new doctor.. He says 25 mg melatonin is too much I told him I already tried low dose,at beginning then he say not to take them if low dose dont work but I found that 25 mg works for me.