Melatonin Side Effects: What You Need to Know

| Modified on Aug 07, 2024
The comments below reflect the personal experiences and opinions of readers and do not represent medical advice or the views of this website. The information shared has not been evaluated by the FDA and is not intended to diagnose, treat, or prevent any disease or health condition. Always consult a qualified healthcare professional for medical concerns.
Side Effects
Posted by Kenny H (TN) on 03/17/2021

For many years, I had trouble sleeping and took Melatonin and always felt groggy and a hangover from taking it, but since pot is not legal in TN, what choice did I have? And then all of a sudden, my whole system flipped and then suddenly I couldn't get enough sleep! Suddenly 8 hrs was not enough and I always felt exhausted! What a nightmare! Not saying the melatonin had anything to do with it, but it what I was taking and it scared the holy hell out of me!

Now I'm fighting diabetes and liver damage and thyroid malfunction which came on all of a sudden also and while I am overcoming that slowly but surely by alternate day fasting, cutting ALL wheat products out of my diet, and the old timey cottage cheese and oil (Flax, black seed & Hemp oil) medicine cancer cure remedy!

But I'm not my old self by any stretch as before I started taking melatonin every night and so am very leery about ever taking melatonin again! Besides it always makes you feel so tired and groggy and who the hell needs that when your 65 yrs old? Certainly not me! So the jury is still out on that one! The side effect of melatonin is it makes you drowsy and tired, and I need just the opposite of that!

Side Effects
Posted by HisJewel (New York) on 01/31/2021
★★★★★

Regarding Melatonin Side Effects,

Melatonin was a big help in starting my fight to get well even with side effects.

I decided to reorder some more Melatonin, because I was glad that I had it on hand to meet a possible emergency during my coughing fits. As I mentioned I took about 100mgs of Melatonin for each of 3 days. I took 4 to 5 pills a few times a day and once at night. They were 5mgs each. No, my brand did not make me sleep or sleepy; however, I found that when I was ready to sleep they let me sleep at least an hour or two at night. The side effect I had was loose stools.

Some years ago, I had ordered some Melatonin from eBay. I am not sure why I bought them, I do remember reading a book back then that said it was good for stopping any further memory loss in its track. Anyway, this Melatonin product was from overseas, it was a powder, and a very high mgs per tiny scoop. I do not remember the company. I remember going to sleep that night and not waking up until morning. In the garbage it went. As I used to do all night prayer often and too much sleep would interfere with my work. The interesting thing is I do not remember having any side effect, only what it said it would do give me sleep.

The Melatonin that I had on hand when I was sick this month, I bought last year because Earth Clinic, Art and others posted Melatonin benefits for COVID 19.When I decided to buy more, I noticed that I needed to find out what "Other ingredients" are in each brand and kind of Melatonin. The company that I got mine from had at least 3 different kind of Melatonin mixtures. I did not want any artificial sweeter in mine so I was reading the labels. Then it dawn on me that perhaps one of the" Other ingredients" in the brand that I already had was what caused the side effect that I encountered. So please read the label.

HisJewel

Side Effects
Posted by Deb (Treasure Island, FL) on 07/24/2021

I have noticed nose bleeds with melatonin


Side Effects
Posted by Bbhe (Nyc) on 09/21/2020

I definitely feel your pain. I had insomnia for years. Turned out it was gluten. (Yeah, I thought I'd tried eliminating it, but I guess I hadn't. If I get even a pinch of flour, ping, eyes wide open all night long.) Melatonin makes me loopy as well unless I take a tiny tiny dose. Also, if I do high intensity workouts sometimes that makes it worse, especially if I'm fasted.

GOOD LUCK and SWEET DREAMS.


Side Effects
Posted by Stacey (Greensboro, Nc) on 08/04/2009

Hi Manti,

I use to take melatonin, but stopped because of two side effects. One side effect was that it acted as a diuretic, so I really didn't get much sleep b/c of running to the bathroom. The other was very real dreams. It got to the point that I could not figure out if I had really had conversations with people in my dreams versus reality. Melatonin is actually a hallucinagen your body naturally produces. I guess when you add more of the chemical to your body, it coases you to dream more realistically.


Side Effects
Posted by Art (California) on 08/07/2024 2333 posts

Hi Bindi,

If 1.5 mg of melatonin caused you that much distress, then all forms of supplemental melatonin should be off your list of supplements! All is not lost though. Instead, you can get your melatonin from the earlier morning and later afternoon sun exposure, foods rich in melatonin and red light therapy. These natural forms of melatonin seem to avoid any potential side effects of melatonin and the sun can improve your circadian rhythms also.

I wrote an article awhile back that describes a few natural ways to get melatonin here :

https://www.earthclinic.com/supplements/how-to-increase-melatonin-naturally.html

Art


Side Effects
Posted by Gertjr (Madison) on 09/16/2020

I've been taking a, for me, high dose of melatonin for insomnia. I've been taking 10 mg at 7, another 10 mg at 8 and one more at 9, then off to bed. The first night I slept fine, next night not so great and, but the third night, was having stomach troubles. So, I backed off for a week. I then to 10 mg at 7 and, at 9, took a 10 mg timed release tablet. I kept waking up but my concern is that I was dizzy. I had to be careful getting up and then was fine. So I stopped it for several days.

Then, last night, I took a 5 mg regular tablet and, during the night, woke up dizzy. Even at the gym this morning, doing barbell bench presses, I was dizzy upon sitting up. So, is this the melatonin or something else? I stay hydrated and my blood pressure was good (I took it several times), so it's not that.

Possibly low blood sugar? I had not eaten for some time when it happened. Any thoughts? I swim, so wonder if it's not my ears? I do not have vertigo during my normal day, only upon rising from flat to sitting (of course I don't stand until it passes). I don't want to visit a dr until I've eliminated other causes. Thanks. I really need relief of the insomnia! I've taking benadryl and want to stop.

Side Effects
Posted by Sam (Miami ) on 04/01/2023

Denise, Google Mexidol. Also chinese herbal formulas: bupleurum&dragon bone is one of what it is called “shen tonics” that is very good. Better yet see an acupuncturist/herbalist. Never buy any supplements on Amazon. Mexidol is an exception-you can only buy it on Amazon. It might take up to 3 years to get off clonazepam.


Side Effects
Posted by Manti (Tulsa, OK) on 07/31/2009

I was wondering about the use of melatonin..some use it as a sleep aid and i've heard it works really well..is there any other uses..are there any side effects of the oral form, is there any longterm side effects noted from using it?

Side Effects
Posted by Denise E (Crescent City, CA) on 03/29/2023

I doubt I'd wake up at all if I took as much as some folks do, I am shocked don't mind saying. I took a 10mg tablet and felt groggy for most of the a.m. so please be careful with trying it out.

I need something to help me sleep as I am weaning off clonazapam and melatonin was again suggested. I was having a hard time at night, not upping to my usual dose of 1 mg of clonazapam, so I'd just fall back into the 1 mg per day. I'm hoping just a smaller dose of Melatonin will help me and not leave me hungover, or groggy.

I found some bottles of 5 mg Melatonin, but then I kept looking, and found 3 mg bottles so I bought the later. Very inexpensive and I am hoping. It these don't work for me, then I guess I'll have to find another hopefully safe sleeping supplement.


Side Effects
Posted by Bindi (New Jersey) on 08/06/2024

HI Art,

I've tried melatonin a couple of times. Each time the side effects were terrible: nightmares, unable to breathe as I struggled to wake up, dizziness and nausea. felt I was drowning .the dose was 1.5 mg.

I suffer from Ibs, fibromyalgia, arthritis, anxiety and a lot of stress. Would this have interfered with neurotransmitters/hormones?

Thank you.