Yes, about 1 mg of melatonin is usually fine after LASIK, as long as your surgeon confirms it suits your other medicines.
It won’t speed up your recovery, but it isn’t known to slow it either. Take it 30 to 60 minutes before bed, after your last eye drops, for a few nights only. Two catches: 22 of 25 melatonin gummies in a JAMA test had the wrong dose on the label, and blood thinners, anti-seizure medicines or a sleeping pill from your clinic can clash with it. Here’s how to use it safely.
Key Takeaways
- Melatonin isn’t known to interfere with LASIK healing, but no study shows it speeds healing. It only helps you fall asleep.
- Keep it low and brief: about 1 mg, 30 to 60 minutes before bed, for a few nights.
- Check the product: 22 of 25 melatonin gummies tested in a JAMA study were inaccurately labelled.
- Poor sleep itself can dry your eyes. In one study, a single sleepless night cut tear secretion.
What You’ll Read Online vs What the Evidence Shows?
Melatonin is a hormone your brain releases in the dark. As a supplement it nudges sleep timing rather than sedating you. Lab and animal work suggests it may protect corneal cells and, in dry-eye mice, raise tear volume, but that hasn’t been tested as a LASIK healing aid.
| What you’ll often read | What we found |
|---|---|
| “Melatonin is safe and won’t affect healing.” | No trial tests this in LASIK patients. Short-term use appears safe for most people generally, but interactions matter. |
| “Any brand will do.” | Independent tests found most products off-label, in both tablets and gummies (details below). |
| “Sleep just helps you rest.” | In a 20-person study, one sleepless night reduced tear secretion and shortened tear-film break-up time. |
| “Wear your shield for X days.” | Clinic advice ranges from the first night to four weeks. Yours is the one to follow. |
Why Sleep Matters More Than the Supplement?
Dryness is a common complaint in the first weeks, and sleep affects it. The tear study used 20 healthy men, not LASIK patients, but it explains why bad sleepers often feel their eyes are drier.
Sleep also matters for safety. The flap is most vulnerable in the first 24 to 72 hours, and rubbing during sleep is among the common causes of displacement; here are the signs that a flap has moved. Your shield protects against that. Melatonin doesn’t, and it may leave you drowsier.
Can You Take It the Night of LASIK, and After?
| When | What’s usually happening | Melatonin? |
|---|---|---|
| Surgery day | You rest with your eyes closed for a few hours. Some patients get a mild sedative, so check whether you’ll be sedated. | Usually unnecessary. Many feel sleepy anyway. |
| Night 1 | The shield goes on. How long it stays on varies by clinic. | ✅ 1 mg is reasonable if your surgeon agrees, after your last drops. |
| Days 2 to 7 | Dryness and light sensitivity ease. A check-up usually comes the next day. | ⚠️ Short use only if you still can’t sleep. |
| After week 1 | Most people are back to routine. | ✅ Not needed for recovery. Ongoing poor sleep needs a doctor. |
Sources: AAO; LASIK Plus; Mayo Clinic.
How Much Melatonin, and When?
- Dose: sleep studies mostly use 0.5 to 5 mg. Higher doses bring morning grogginess and headaches. Start at 1 mg or less.
- Timing: 30 to 60 minutes before bed, after your last scheduled drops. Don’t add extra drops to fill the wait.
- Screens: Harvard researchers found blue light suppressed the body’s own melatonin about twice as long as green light. Their advice is to avoid bright screens two to three hours before bed, or a tablet is fighting your phone.
- Next morning: Mayo Clinic advises not driving within five hours of a dose, so never take one in the small hours and then head to your check-up.
- Duration: short-term use appears safe, but NCCIH says long-term data is lacking. Think days, not months.
Tablet, Gummy or Blend? What Testing Found
| Product type | What independent testing found | What to do |
|---|---|---|
| Tablets and capsules | In a 2017 study of 31 products, over 71% missed the label by more than 10% (83% less to 478% more). About 26% held unlisted serotonin. | Buy plain melatonin from a pharmacy. |
| Gummies | In a 2023 JAMA study of 25 products, 22 (88%) were mislabelled, with 74% to 347% of the stated dose. Five contained CBD. | Avoid them for post-op sleep. |
| Multi-ingredient sleep blends | Not tested here, but more ingredients mean more possible interactions. | Skip them while healing. |
Sources: JCSM 2017; JAMA 2023; NCCIH.
Who Should Ask a Doctor First?
| Your situation | What it means | What to do |
|---|---|---|
| Healthy adult, no regular medicines | ✅ A low dose for a few nights is generally reasonable | Confirm with your surgeon; start at 1 mg |
| Your clinic already gave you a sleep medicine or sedative | ⚠️ Sedatives add up with melatonin | Ask which one to use; see sleeping pills after LASIK |
| Blood thinners (warfarin, apixaban, clopidogrel) | ⚠️ Bruising and bleeding risk may rise | Get your doctor’s advice first |
| Epilepsy or anti-seizure medicine | ⚠️ Seizures may become more frequent | Use only under medical supervision |
| Blood pressure or diabetes medicines, or fluvoxamine | ⚠️ Blood pressure and sugar can shift. Fluvoxamine raises melatonin about 17-fold. | Ask before taking any |
| Autoimmune disease | ❌ Mayo Clinic advises against it | Don’t self-start |
| Pregnant, breastfeeding or under 18 | ❌ Not one to self-start | Speak to your doctor first |
Sources: Mayo Clinic; NCCIH; Drugs.com.
Can’t Sleep? Match the Cause
| What keeps you awake | Will melatonin help? | A better first step |
|---|---|---|
| Gritty, dry eyes | ⚠️ No | Use your prescribed lubricant; compare the best lubricating drops after LASIK |
| Waking with dry, sore eyes every morning | ⚠️ No | Tell your surgeon. Some people sleep with their eyes partly open, which dries them overnight (AAO) |
| Aching or sharp eye pain | ❌ No | Read what eye pain at one week means and how to relieve it; call your clinic |
| Light sensitivity | ⚠️ Not really | Darken the room; check the facts on a sleep mask after LASIK first |
| Racing mind, pre-op nerves | ✅ Possibly, at a low dose | Screens off well before bed |
| Body clock thrown by travel or late nights | ✅ Body-clock problems are what melatonin is for | Fixed bedtime, morning daylight |
Sources: AAO; Mayo Clinic; Harvard Health.
Two habits also protect your eyes overnight: avoid sleeping face-down, and keep air off your face (see sleeping with a fan).
Side Effects and Red Flags
Usual side effects are mild: headache, dizziness, nausea and drowsiness. If you feel foggy next day, halve the dose or stop. Some grogginess may be the sedative, not the supplement; that’s why some patients feel sleepy after LASIK.
Call your clinic the same day for sudden sharp pain, a big drop in vision after it had improved, or severe light sensitivity, especially after rubbing or a bump. These aren’t sleep problems.
Bottom Line
For most healthy adults, low-dose melatonin for a few nights is a reasonable way through the restless first week, once your surgeon has cleared it. It won’t heal your eyes; your shield, drops and follow-ups do that. Keep the rest of your aftercare on track with these dos and don’ts after laser eye surgery, and if you’re unsure about your medicines, talk to our team at Visual Aids Centre before your procedure.
FAQs
Can I take melatonin the night of my LASIK?
Often yes, at a low dose, once your surgeon confirms it suits your medicines. Many patients feel sleepy anyway.
Can I take it the night before LASIK?
Ask your clinic at pre-op. We’re not aware of LASIK-specific data, so the same dose and interaction rules apply.
How much is safe, and for how long?
About 1 mg for a few nights. Short-term use appears safe; long-term data is lacking (NCCIH).
Does melatonin make dry eyes worse?
It isn’t known to. Dryness is common after LASIK, so keep using your lubricating drops.
Can I use melatonin with my eye drops?
We’re not aware of a known interaction. Take your drops first and confirm with your surgeon.
Should I tell my surgeon I take it?
Yes. Mention every supplement at your check-up, alongside your prescribed drops.
