I have been taking dren for 3 days as of today and I have already noticed the effects. The first pill I took I did not notice the effects at all because my body was in a state of shock because my work hours changed from working a daytime shift to a night time shift.

The following day (my second pill) I did not notice any immediate effects, but I did decide to give it a try with my workout at my gym.

I was surprised that I had bursts of energy and I could actually do bicycle kicks (ab workout) and not get tired. It seemed as if the more I did, the more energy I had, and I did not tire out once even after doing heavy weight-lifting including bench, lat pull downs, T-bar rows, and chin ups. I did have a little muscle fatigue of course, but that was only because I was doing heavy sets.

Overall day 2 was filled with energy.

Im on Day 3 as of today, and I regret popping the 3rd pill because I went with the mentality of "I will burn fat while I sleep". I made a very bad choice, because I did sleep for about 30 mins, but my body was getting jolts of energy due to the caffine.

Literally, my arms were involuntary jumping around, and my heart was pumping out jolts of blood for a good 5 minutes. Although I am tired, I cannot sleep, but I do feel the "euphoric" effects, but I would just call it calming or relaxing after the caffine wore out.

Although 3 days is not a good amount of time to rate a product, it is a good way to rate the initial phase of intake.

Overall the initial intake is a good source for energy, and I noticed no unwanted side effects.

Keep in mind that no pill can replace calories or nutrients, I am on a protein rich diet and I would reccomend to use Dren to only supplement your workout regime, not replace it. Also only take 1 pill a day and DO NOT take one before you go to bed, because you will not be able to sleep until the effects wear off.

As far as fat burning goes, I have read many reviews on this product and many people say that it does not burn fat like people think it does.

The term fat burner is just a ploy to get you to buy this product. However, Dren theoretically promotes fat loss because it encourages intense amounts of energy to last longer in the gym, therefore it may boost the chances of fat loss.

Dren. Not sure if it does anything but make me feel like I'm going to vomit just over an hour after taking it. My mouth waters and I feel like I need to puke. Then, within a minute or two the feeling goes away and I don't feel anything. Not sure these pills are doing a damn thing to me.

I am a 61 year old male in great health and condition. I was trying Dren to lose some of the remaining fat before a running competition.

My blood pressure is normally 115/67. About 40 minutes after taking Dren I started to feel a chill and a tightness in my chest. I took my blood pressure and it was 204/100!

It seems the yohimbine mixed with PEA causes hypertensive crisis when mixed with Tyramine (Tyrosine) which is in my pre-workout drink.

My 30 year old son experienced severe headaches for days after taking this product. I would not recommend it to anyone.

I took DREN for about 2 weeks. I did not notice any of the effects that they said I would. I did not have the "happy" feeling and I did not see any results. What I did notice was that I was starting to feel sick every day that I was on it.

I was constipated even though I was drinking a minimum of a gallon of water a day. I felt so hot during the day that it was almost uncomfortable.

The last effect that I noticed was a strange pain in my lower back, on my sides. Isn't that where your kidneys are?

Well, it was really uncomfortable and beginning to really bother me. As soon as I stopped taking DREN, the pain went away, the constipation went away, and my sick feeling was gone as well.

Some people seem to love this fat burner, but it is not for me.

I'm a fairly hardcore bodybuilder and, like most bodybuilders and/or competitors, my goal is to bulk in the winter and lean out for summer.

I've found that most "formulated" OTC fat burners are not good for much except a jolt of energy. In my experience, the caffeine/ephedrine combination or caffeine/yohimbine are the most effective for fat mobilization and/or appetite suppressing.

OK, now onto the review of Dren. Of course, the name draws you in because of it's similarity to Clenbuterol. Normally, I try to cycle my fat burners, taking them straight for 2 weeks, then off for 1 week. I stopped taking Dren after 1 week because of the after effects.

I have never experienced so many jitters as with Dren. I took 1 in the morning and could barely go to sleep at night. Then, it was all I could do to wake up the next morning. After a week of this, I was so exhausted. I did, however lose about 2 pounds in that week.

I suppose you could say it was effective, but I'm pretty sure it was the result of me be so fidgety all day that I couldn't sit still. I would love to try it for a longer period, but I'm honestly scared to.