Melatonin Side Effects: What Australian Women Should Know

For most adults, yes. In Australia, melatonin sits under the Therapeutic Goods Administration as a prescription medicine for people under 55 (and even for over-55s, the over-the-counter version is limited to short-term insomnia use). Compare that to the US, where you can grab a bottle of gummies at the supermarket checkout — different regulatory worlds entirely.

The reason isn't that melatonin is scary. It's that it's a hormone, not a vitamin or a herb. Hormones interact with the rest of your endocrine system, and the TGA takes the position that anything that does that should be talked through with a doctor first.

So if you've been wondering why every American skincare influencer is on it and your local chemist gives you a confused look — that's why.

Next-day grogginess is the big one. Melatonin doesn't always 'wear off' cleanly — a lot of people wake up feeling like they slept through a 14-hour flight rather than a normal night. That's because melatonin lingers in some people's systems longer than the marketing suggests.

Headaches are number two. They're usually mild, but they're common enough that the FDA's adverse event database has them as one of the most-reported side effects.

Vivid or unsettling dreams. Melatonin influences REM sleep, which is where dreams live. Some people love it; others find it deeply weird.

Mood dips. A small but real group of people notice they feel flat or low the day after taking melatonin. It's individual, and worth tracking if you decide to try it.

Hormonal interactions. This is the one we'd want any woman to know about. Melatonin can interact with reproductive hormones, which is why it's not generally recommended during pregnancy, breastfeeding, or if you're actively trying to conceive — speak to your GP first.

Smaller body mass plus hormonal sensitivity. The standard 'starter' melatonin dose (3mg, 5mg, sometimes 10mg) is usually way more than your body would ever produce naturally — we're talking 10 to 100 times more. Smaller women tend to feel that overshoot harder.

If you've ever taken a melatonin gummy on holiday and woken up feeling underwater, that's the dose talking, not your sleep quality.

Our Wind Down Sleep Gummies were built specifically for this — a sleep ritual without the hormone. 200mg L-Theanine (the calming amino acid in green tea), magnesium, GABA, glycine and ashwagandha, paired with valerian, chamomile and passionflower botanicals.

It's not designed to knock you out. It's designed to soften the edge of the evening so your body can drift off the way it's meant to. Two gummies, 30 to 40 minutes before bed, every night — that's it.

Most of our customers come to us after a few rough trips with melatonin (the grogginess, the dreams, the mood dip) and want something they can actually take long-term without worrying about hormonal flow-on effects.

Short-term jet lag, shift work transitions, and clinically diagnosed circadian rhythm disorders — these are the situations where melatonin earns its place. Your GP is the right person to talk to about a script if any of those apply.

For 'I just can't switch off at night' or 'my brain won't stop' — that's a wind-down problem, not a hormone deficiency. And it's the one we'd argue is better solved with the L-Theanine and magnesium route than with a hormone you don't actually need.