[dawnr518]

I started Phentermine yesterday at a dose of 37.5 mg once a day. I could not sleep at all last night. I might of caught 1 hour if that. Today I still have unbelievable amounts of energy! I took my second pill at 6:30 this morning..and it is 12 hours later and still cant even think of sleep. Anyone else experience this? and what helped if yu did. Thanks

[slsorren]

I started taking Phentermine last Sunday. Sunday night I fell asleep at 10 pm and woke up at 1 am and was up until 4 am.. then finally was able to fall back asleep till 645 am when my alarm went off. The next night was not as bad, but I still kept tossing and turning.. As the week went on I am able to sleep better and today I was even able to take a nap in the afternoon. Once I wake up in the morning, I'm up for good. The only problem I have are major headaches that I have from when I wake up until I go to sleep. But within a few days that side effect should disappear for you! Goodluck!

[jkdkojones]

I just started taking Phentermine on Tuesday and I was having the same problem. I would go to sleep fine and then wake in the middle of the night with so much energy for a couple hours. Then fall back asleep an hour or two before my alarm clock was going off. It gets a little better each night, so just keep sticking it out for a week for 2 for your body to get adjusted to the medicine and it should subside. This is what I was told as well and it is getting better each day. Hang in there. Good Luck!!!!

[Cmarie123]

Try using Simply Sleep by Tylenol. It will help. The insomnia won't last too long, maybe a couple of weeks.

[2mmak2]

I've never heard of simply sleep, but I know I had the same side effect for a good 2 weeks or so. I ended up taking a unisom almost every night to help me go to sleep. I know a lot of people take tylenol pm too. I think I might try simply sleep when I start taking phen again.

Are you exercising? Try exercising in the morning if you can- after you take phen and then try exercising at night before you go to bed.

[mdet06]

The first 2 weeks that I took phen it caused insomnia for me 3-4 nights out of the week. It's hard to deal with during school and work. I found taking it early as possible in the morning worked best for me, even if that meant taking it before bed so I woke up with energy and could sleep the next night.

[gigglezz]

I think that this is a very common side effect.....I have been dealing with no sleep for so long that I almost consider beeing sleep deprived a friend!LOL! I have started going to bed the same time every night and it has actually worked for me got my body use to sleep at the same time