Drug & supplement interaction

Melatonin + Sulfacytine

Sulfacytine brand name: Renoquid.

No Known Interaction

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS · Updated July 2026 · Pair last verified Sep 13, 2026

The bottom line No known interaction

We found no known interaction between Melatonin and Sulfacytine in our sources. Absence of a documented interaction is not the same as proven safety, and does not guarantee one does not exist. Do not start, stop, or change a medication or supplement based on this page; confirm with your pharmacist or doctor first.

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Interaction report

Melatonin and Sulfacytine

We checked these two against our interaction database. Here is what we found.

No Known Interaction Found

We did not find a documented interaction between Sulfacytine and Melatonin in our sources. This does not guarantee that the combination is completely free of risk — there is often limited research on supplements and herbal products, especially around drug interactions.

If you decide to take both, the practical routine is simple: add one new thing at a time and note the date you started it. If the combination is going to disagree with you, it usually shows in the first days to a couple of weeks — and a start date turns “I’ve been feeling off” into something a pharmacist can actually work with. Do not stop a prescribed medicine on your own.

Always talk with your pharmacist or doctor before making changes to your medications or supplements, particularly if you take several medications or have an ongoing health condition.

Melatonin safety at a glance

Melatonin overall Use caution Generally well tolerated for short-term use, but long-term safety is less certain and product quality varies.

Pregnancy Possibly Unsafe When used orally or parenterally in high doses or with frequent use. High doses of melatonin 75-300 mg daily seem to inhibit ovulation, causing a contraceptive... Read the full pregnancy detail

Breastfeeding Avoid Safety while breastfeeding has not been established, so avoid unless directed by your doctor.

Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center) — the full detail is in the Special populations card below. Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Sulfacytine and Melatonin? Ask Dr. Brian Staiger, PharmD, BCPS directly ›

How we checked

Why No Interaction Is Listed for Sulfacytine

Interactions in our licensed database are recorded against drug classes, not just single drug names. Sulfacytine is filed under a single classification — oral drugs. Melatonin has documented interactions with 18 drug classes — the most serious being anticoagulant/antiplatelet drugs (moderate), anticonvulsants (moderate) and antidiabetes drugs (moderate) — and none of Sulfacytine’s classifications are among them.

Classification data comes from our licensed Natural Medicines dataset. A medication can belong to classes beyond those recorded there, so this describes how the check was run — it is not a safety guarantee.

Keep it in perspective

Melatonin Does Interact With Other Medications

Melatonin has 1,116 moderate, 345 minor known drug interactions in our database — Sulfacytine isn’t one of them. If you take anything else, check it against the full list below.

Moderate 1,116 Minor 345 No known interaction 1,369 (incl. Sulfacytine)

Taking anything else?

Check Another of Your Medications Against Melatonin

Covers the 2,830 medications we’ve checked against Melatonin. Pick one to open its full report.

What to actually watch for

What Melatonin Itself Has Been Linked To

This is not an interaction — nothing below involves Sulfacytine. It is the side-effect record for Melatonin on its own, from the licensed Natural Medicines monograph. If something new turns up after you add Melatonin, this list is the first place to look. 6 entries are worth acting on rather than waiting out — marked below.

Dependence or withdrawal symptoms / Hallucinations / Low mood Worth acting on Additional detail
“Orally, melatonin may cause mood changes, including dysphoria (sadness), dips in mood, nervousness, suicide or self-injury, or transient depression. Delusions and hallucinations have also been reported in clinical research. An analysis of adverse event case reports indicates that drug abuse, dependence, and withdrawal have been associated with melatonin use;”

Melatonin · Natural Medicines adverse-effect record, reported in attention deficit-hyperactivity disorder (adhd).
6 sources cited

1764. Carman JS, Post RM, Buswell R, et al. Negative effects of melatonin on depression. Am J Psychiatry 1976;133:1181-1186. PubMed

62345. Smits, M. G., van Stel, H. F., van der, Heijden K., Meijer, A. M., Coenen, A. M., and Kerkhof, G. A. Melatonin improves health status and sleep in children with idiopathic chronic sleep-onset insomnia: a randomized placebo-controlled trial. J Am Acad.Chi PubMed

62450. van der Heijden, K. B., Smits, M. G., van Someren, E. J., Ridderinkhof, K. R., and Gunning, W. B. Effect of melatonin on sleep, behavior, and cognition in ADHD and chronic sleep-onset insomnia. J Am Acad.Child Adolesc.Psychiatry 2007;46(2):233-241. PubMed

62792. van Geijlswijk, I. M., Korzilius, H. P., and Smits, M. G. The use of exogenous melatonin in delayed sleep phase disorder: a meta-analysis. Sleep 2010;33(12):1605-1614. PubMed

62784. Alstadhaug, K. B., Odeh, F., Salvesen, R., and Bekkelund, S. I. Prophylaxis of migraine with melatonin: a randomized controlled trial. Neurology 10-26-2010;75(17):1527-1532. PubMed

114510. Ha M, Yoon D, Lee CY, et al. Investigating the safety profiles of exogenous melatonin and associated adverse events: A pharmacovigilance study using WHO-VigiBase. J Pineal Res 2024;76(2):e12949. PubMed
Low sodium / Confusion Worth acting on Additional detail
“Orally, melatonin may cause migraine-like headache or dizziness. Often these symptoms occur during the first few days of treatment and subside after a few days. Melatonin may also cause drowsiness or fatigue when taken orally. These symptoms appear to be more common if melatonin is taken in the morning or at very high doses (greater than 50 mg).”

Melatonin · Natural Medicines adverse-effect record, reported in cluster headache.
6 sources cited

1070. Ellis CM, Lemmens G, Parkes JD. Melatonin and insomnia. J Sleep Res 1996;5:61-5. PubMed

1077. Petrie K, Dawson AG, Thompson L, Brook R. A double-blind trial of melatonin as a treatment for jet lag in international cabin crew. Biol Psychiatr 1993;33:526-30. PubMed

15034. Weiss MD, Wasdell MB, Bomben MM, et al. Sleep hygiene and melatonin treatment for children and adolescents with ADHD and initial insomnia. J Am Acad Child Adolesc Psychiatry 2006;45:512-9. DOI

62384. Buscemi, N., Vandermeer, B., Pandya, R., Hooton, N., Tjosvold, L., Hartling, L., Baker, G., Vohra, S., and Klassen, T. Melatonin for treatment of sleep disorders. Evid.Rep.Technol.Assess.(Summ.) 2004;(108):1-7.

62450. van der Heijden, K. B., Smits, M. G., van Someren, E. J., Ridderinkhof, K. R., and Gunning, W. B. Effect of melatonin on sleep, behavior, and cognition in ADHD and chronic sleep-onset insomnia. J Am Acad.Child Adolesc.Psychiatry 2007;46(2):233-241. PubMed

62710. Bendz, L. M. and Scates, A. C. Melatonin treatment for insomnia in pediatric patients with attention-deficit/hyperactivity disorder. Ann.Pharmacother. 2010;44(1):185-191. PubMed
Unsteadiness Worth acting on Additional detail
“Orally, melatonin might increase fall risk. Analysis of a large adverse event database suggests that the rate of accidents and falls is higher with melatonin use when compared with the average rate of all other medications combined. However, the rate of accidents and falls with melatonin use seems to be lower when compared with other sleep medications.”

Melatonin · Natural Medicines adverse-effect record, reported in back pain.
6 sources cited

114510. Ha M, Yoon D, Lee CY, et al. Investigating the safety profiles of exogenous melatonin and associated adverse events: A pharmacovigilance study using WHO-VigiBase. J Pineal Res 2024;76(2):e12949. PubMed

97442. Lui MFG, Chow HKD, Wong WMK, Tsang WNW. Melatonin affects postural control in community-dwelling older adults while dual-tasking: a randomized observation study. J Aging Phys Act. 2018 May 29:1-24. PubMed

9181. Herxheimer A, Petrie KJ. Melatonin for the prevention and treatment of jet lag. Cochrane Database Syst Rev 2002;2:CD001520. PubMed

62456. Klupinska, G., Poplawski, T., Drzewoski, J., Harasiuk, A., Reiter, R. J., Blasiak, J., and Chojnacki, J. Therapeutic effect of melatonin in patients with functional dyspepsia. J.Clin.Gastroenterol. 2007;41(3):270-274. PubMed

9715. Williamson BL, Tomlinson AJ, Naylor S, Gleich GJ. Contaminants in commercial preparations of melatonin. Mayo Clin Proc 1997;72:1094-5. PubMed

9716. Williamson BL, Tomlinson AJ, Mishra PK, et al. Structural characterization of contaminants found in commercial preparations of melatonin: similarities to case-related compounds from L-tryptophan associated with eosinophilia-myalgia syndrome. Chem Res To
Seizures Worth acting on Additional detail

“Orally, melatonin is generally well tolerated.

Most Common Adverse Effects:

Orally: Dizziness, drowsiness, headache, and nausea.

Serious Adverse Effects (Rare):

Orally: There is concern that melatonin may increase the risk for seizure.”

Melatonin · Natural Medicines adverse-effect record, reported in cluster headache.
Chest pain Worth acting on Additional detail
“Melatonin might increase levels of very low-density lipoprotein (VLDL) cholesterol and triglycerides. Several rare or poorly described cases of abnormal heart rhythms, palpitations, fast heart rate, or chest pain have been reported. However, in these cases, the patients were taking other drugs that could account for the symptoms, and melatonin was not thought to be the cause.”

Melatonin · Natural Medicines adverse-effect record, reported in pain.
6 sources cited

62176. Wakatsuki, A., Okatani, Y., Ikenoue, N., Kaneda, C., and Fukaya, T. Effects of short-term melatonin administration on lipoprotein metabolism in normolipidemic postmenopausal women. Maturitas 4-20-2001;38(2):171-177. PubMed

1079. Claustrat B, Brun J, David M, et al. Melatonin and jet lag: confirmatory result using a simplified protocol. Biol Psychiatr 1992;32:705-11.

9181. Herxheimer A, Petrie KJ. Melatonin for the prevention and treatment of jet lag. Cochrane Database Syst Rev 2002;2:CD001520. PubMed

62776. Wade AG, Ford I, Crawford G, et al. Nightly treatment of primary insomnia with prolonged release melatonin for 6 months: a randomized placebo controlled trial on age and endogenous melatonin as predictors of efficacy and safety. BMC Med 2010;8:51. PubMed

62789. Wade, A. G., Crawford, G., Ford, I., McConnachie, A., Nir, T., Laudon, M., and Zisapel, N. Prolonged release melatonin in the treatment of primary insomnia: evaluation of the age cut-off for short- and long-term response. Curr.Med.Res.Opin. 2011;27(1):87 PubMed

63067. U.S.Food and Drug Administration. Special Nutritionals Adverse Events Monitoring System: registered case reports.
Liver problems Worth acting on Additional detail
“A case of autoimmune hepatitis has been reported for a patient who took melatonin orally to treat insomnia. Melatonin use has also been linked to a few cases of Gilbert's syndrome.”

Melatonin · Natural Medicines adverse-effect record, reported in hepatitis.
2 sources cited

63037. Hong, Y. G. and Riegler, J. L. Is melatonin associated with the development of autoimmune hepatitis? J Clin Gastroenterol 1997;25(1):376-378. PubMed

114510. Ha M, Yoon D, Lee CY, et al. Investigating the safety profiles of exogenous melatonin and associated adverse events: A pharmacovigilance study using WHO-VigiBase. J Pineal Res 2024;76(2):e12949. PubMed
Heartburn Additional detail
“Orally, melatonin may cause nausea, abdominal cramps, or mild abdominal pain, diarrhea, constipation, or decreased appetite. Often these symptoms occur during the first few days of treatment and subside after a few days. In some cases, rates of symptoms are similar between melatonin and placebo.”

Melatonin · Natural Medicines adverse-effect record, reported in constipation.
6 sources cited

62384. Buscemi, N., Vandermeer, B., Pandya, R., Hooton, N., Tjosvold, L., Hartling, L., Baker, G., Vohra, S., and Klassen, T. Melatonin for treatment of sleep disorders. Evid.Rep.Technol.Assess.(Summ.) 2004;(108):1-7.

62770. van Geijlswijk, I. M., van der Heijden, K. B., Egberts, A. C., Korzilius, H. P., and Smits, M. G. Dose finding of melatonin for chronic idiopathic childhood sleep onset insomnia: an RCT. Psychopharmacology (Berl) 2010;212(3):379-391. PubMed

114510. Ha M, Yoon D, Lee CY, et al. Investigating the safety profiles of exogenous melatonin and associated adverse events: A pharmacovigilance study using WHO-VigiBase. J Pineal Res 2024;76(2):e12949. PubMed

62450. van der Heijden, K. B., Smits, M. G., van Someren, E. J., Ridderinkhof, K. R., and Gunning, W. B. Effect of melatonin on sleep, behavior, and cognition in ADHD and chronic sleep-onset insomnia. J Am Acad.Child Adolesc.Psychiatry 2007;46(2):233-241. PubMed

62754. Elkhayat, H. A., Hassanein, S. M., Tomoum, H. Y., Abd-Elhamid, I. A., Asaad, T., and Elwakkad, A. S. Melatonin and sleep-related problems in children with intractable epilepsy. Pediatr.Neurol. 2010;42(4):249-254. PubMed

62914. Papavasiliou, P. S., Cotzias, G. C., Duby, S. E., Steck, A. J., Bell, M., and Lawrence, W. H. Melatonin and parkinsonism. JAMA 7-3-1972;221(1):88-89. DOI

Showing the 10 most notable of 32 recorded effects — ranked by how unusual each one is across medicines generally, with serious effects weighted up.

Everything above comes from the Natural Medicines adverse-effect record for Melatonin — expand a row for the licensed statement it rests on. We haven’t matched Sulfacytine to its FDA label in our system yet, so we can’t compare its own side-effect list here — the leaflet that comes with your prescription is the authoritative list for Sulfacytine.

Special populations

Melatonin in Pregnancy & Breastfeeding

Pregnancy Possibly Unsafe

When used orally or parenterally in high doses or with frequent use. High doses of melatonin 75-300 mg daily seem to inhibit ovulation, causing a contraceptive effect. Advise pregnant patients and patients wishing to become pregnant to avoid using melatonin frequently or in high doses. There is insufficient reliable information available about the safety of melatonin in lower doses during pregnancy. Some research shows that taking melatonin 2 mg daily does not affect anterior pituitary hormone levels in females who are not pregnant; this suggests that low doses may not have a contraceptive effect. Other research shows that taking melatonin 3 mg daily during the follicle stimulating stage of in vitro fertilization does not negatively impact pregnancy rates. However, it is not known if melatonin is safe for use throughout pregnancy. Until more is known about the safety of melatonin, avoid using during pregnancy.

DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.© 2026 Therapeutic Research Center

From our Q&A

Questions About Melatonin or Sulfacytine

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Melatonin or Sulfacytine, not necessarily both, but if one is close to what you were about to ask it will usually go further than a database entry can:

Not quite your question? Ask our pharmacists directly — it is free, there is no account required, and answers usually come back within 24 hours.

Everything else you take

See Every Supplement That Interacts With Sulfacytine

This page covers Melatonin only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Sulfacytine page lists 17 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Coffee Charcoal (moderate), European Mandrake (moderate), Glucomannan (moderate) and Guar Gum (moderate).

By severity: 1 major · 7 moderate · 9 minor.

From our pharmacist’s overview on the Sulfacytine page

“Sulfacytine (Renoquid) is a sulfonamide antibiotic, usually prescribed for urinary tract infections, and an antibiotic that absorbs poorly is one that can fail. That makes this list worth genuine caution even though most of its names sound harmless.”

Reviewed by 2 · Jul 18, 2026

Open the Sulfacytine interaction page

One more smart check

Taking Melatonin as Part of a Dietary Supplement Product? Check It for Interactions

We hold 2,885 real supplement products containing Melatonin, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Melatonin. Even though Melatonin itself has no known interaction with Sulfacytine, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:

How much people look this up

Where Melatonin and Sulfacytine Sit Against Everything Else

Out of every supplement and medication people look up on HelloPharmacist, here is where these two land this week — and which way each has been moving.

Supplement Melatonin

Top 5%

#54 of 1,452 supplements looked up here in the last 7 days

29 days ago today

Medication Sulfacytine

Top half

#845 of 2,830 medications looked up here in the last 7 days

29 days ago today

Position among everything looked up on this site, not a measure of how commonly either one is used or how important it is. A supplement can climb this list because of a news story. It counts every request to the page, automated ones included, and nothing here identifies anyone.

Where does our data come from?

Source: the Natural Medicines (TRC Healthcare) clinical database — the evidence-graded professional reference for herb & supplement interactions.
Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every Melatonin reference on this page ↓
Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Melatonin and Sulfacytine records this page draws on were last updated July 11, 2026.
What “no known interaction” means: no documented interaction in the sources above — not a guarantee of safety. Supplements are studied far less than prescription drugs, so we say exactly what the evidence supports, and nothing more.

Data structure & sourcing designed and verified by Dr. Brian Staiger, PharmD, BCPS.

Supplement

About Melatonin

What is Melatonin?

Trouble falling asleep (insomnia)
Jet lag
Delayed sleep phase syndrome
Non-24-hour sleep-wake disorder
Shift-work sleep problems
Sleep problems in some children with conditions like autism or ADHD

Melatonin is a hormone your body makes naturally to help control your sleep-wake cycle, and the supplement form is widely used to help with sleep timing problems and jet lag. The evidence is strongest for certain circadian (body-clock) disorders and is more mixed for everyday insomnia. It is generally well tolerated for short-term use, but talk with your pharmacist or doctor before starting, especially for children or during pregnancy.

Hormone naturally made by the pineal gland; supplements are usually made synthetically · Tablets, capsules, gummies, sublingual (under-the-tongue) tablets, liquids, extended-release tablets

An interaction check asks whether these two react with each other — it does not ask whether Melatonin is a good idea for someone in your situation. Here is what our Melatonin record says about it on its own.

Melatonin: dosing

There is no single standardized dose of melatonin, and products vary widely in strength. Many people find that lower doses work as well as higher ones, and taking more does not always help more. Timing often matters as much as the amount, so for sleep timing problems and jet lag it is usually taken in the evening or before bedtime.The best approach is to follow the directions on the product label and start with the lowest amount that helps.

From our Melatonin monograph — the full record covers uses, side effects and every documented interaction.

Read the full Melatonin monograph & all interactions

Keep checking

Other Drugs & Melatonin

Browse every other medication we’ve checked against Melatonin — both the ones with a known interaction and the ones without. Select any drug for the full detail.

0Major

1,116Moderate

345Minor

1,368No known interaction

1,116 Moderate 345 Minor 1,368 No interaction

Moderate

1,116 interactions

Showing 60 of 1,116 moderate interactions — see all 1,116 on the Melatonin page.

Minor

345 interactions

Showing 60 of 345 minor interactions — see all 345 on the Melatonin page.

No interaction 1,368 drugs checked — show the list

We also checked Melatonin against these medications and found no known interaction in our sources. Open any page to confirm.

Showing the 60 most looked-up of 1,368 medications checked with no known interaction — see the full Melatonin list.

See the full Melatonin interactions page

See every supplement checked against Sulfacytine, ranked by severity

Evidence & sources

Melatonin References

The 118 references that drive our Melatonin monograph and interaction data, from the evidence-graded Natural Medicines (TRC Healthcare) database. Citations with a link open the study on PubMed or the publisher’s site.

Voordouw BC, Euser R, Verdonk RE, et al. Melatonin and melatonin-progestin combinations alter pituitary-ovarian function in women and can inhibit ovulation. J Clin Endocrinol Metab 1992;74:108-17. DOI
Ellis CM, Lemmens G, Parkes JD. Melatonin and insomnia. J Sleep Res 1996;5:61-5. PubMed
Petrie K, Dawson AG, Thompson L, Brook R. A double-blind trial of melatonin as a treatment for jet lag in international cabin crew. Biol Psychiatr 1993;33:526-30. PubMed
Claustrat B, Brun J, David M, et al. Melatonin and jet lag: confirmatory result using a simplified protocol. Biol Psychiatr 1992;32:705-11.
Fauteck J, Schmidt H, Lerchl A, et al. Melatonin in epilepsy: first results of replacement therapy and first clinical results. Biol Signals Recept 1999;8:105-10. PubMed
Arangino S, Cagnacci A, Angiolucci M, et al. Effects of melatonin on vascular reactivity, catecholamine levels, and blood pressure in healthy men. Am J Cardiol 1999;83:1417-9. PubMed
Pierce A. The American Pharmaceutical Association Practical Guide to Natural Medicines. New York: The Stonesong Press, 1999:19.
Lancioni GE, O'Reilly MF, Basili G. Review of strategies for treating sleep problems in persons with severe or profound mental retardation or multiple handicaps. Am J Ment Retard 1999;104:170-86. PubMed
Carman JS, Post RM, Buswell R, et al. Negative effects of melatonin on depression. Am J Psychiatry 1976;133:1181-1186. PubMed
Hartter S, Grozinger M, Weigmann H, et al. Increased bioavailability of oral melatonin after fluvoxamine coadministration. Clin Pharmacol Ther 2000;67:1-6.
Fetrow CW, Avila JR. Professional's Handbook of Complementary & Alternative Medicines. 1st ed. Springhouse, PA: Springhouse Corp., 1999.
Lusardi P, et al. Cardiovascular effects of melatonin in hypertensive patients well controlled by nifedipine: a 24-hour study. Br J Clin Pharmacol 2000;49:423-7. PubMed
von Bahr C, Ursing C, Yasui N, et al. Fluvoxamine but not citalopram increases serum melatonin in healthy subjects – an indication that cytochrome P450 CYP1A2 and CYP2C19 hydroxylate melatonin. Eur J Clin Pharmacol 2000;56:123-7.
Grozinger M, Hartter S, Wang X, et al. Fluvoxamine strongly inhibits melatonin metabolism in a patient with low-amplitude melatonin profile. Arch Gen Psychiatry 2000 Aug;57:812-3. PubMed
Lissoni P, Barni S, Mandala M, et al. Decreased toxicity and increased efficacy of cancer chemotherapy using the pineal hormone melatonin in metastatic solic tumor patients with poor clinical status. Eur J Cancer 1999;35:1688-92.
Sheldon SH. Pro-convulsant effects of oral melatonin in neurologically disabled children. Lancet 1998;351:1254. PubMed
Hartter S, Grozinger M, Weigmann H, et al. Increased bioavailability of oral melatonin after fluvoxamine coadministration. Clin Pharmacol Ther 2000;67:1-6.
Wright KP Jr, Myers BL, Plenzler SC, et al. Acute effects of bright light and caffeine on nighttime melatonin and temperature levels in women taking and not taking oral contraceptives. Brain Res 2000;873:310-7.
Herxheimer A, Petrie KJ. Melatonin for preventing and treating jet lag. Cochrane Database Syst Rev 2001;(1):CD001520.
Briggs, Freeman, Yafee. Update Drugs in Pregnancy and Lactation. Lippincott Williams & Wilkins, 2001.
Suhner A, Schlagenhauf P, Johnson R, et al. Comparative study to determine the optimal melatonin dosage form for the alleviation of jet lag. Chronobiol Int 1998;15:655-66. PubMed
Herxheimer A, Petrie KJ. Melatonin for the prevention and treatment of jet lag. Cochrane Database Syst Rev 2002;2:CD001520. PubMed
Munoz-Hoyos A, Sanchez-Forte M, Molina-Carballo A, et al. Melatonin's role as an anticonvulsant and neuronal protector: experimental and clinical evidence. J Child Neurol 1998;13:501-9.. PubMed
Sandyk R, Tsagas N, Anninos PA. Melatonin as a proconvulsive hormone in humans. Int J Neurosci 1992;63:125-35.. PubMed
Golombek DA, Escolar E, Burin LJ, et al. Chronopharmacology of melatonin: inhibition by benzodiazepine antagonism. Chronobiol Int 1992;9:124-31.. PubMed
Smits MG, Nagtegaal EE, van der Heijden J, et al. Melatonin for chronic sleep onset insomnia in children: a randomized placebo-controlled trial. J Child Neurol 2001;16:86-92.. PubMed
Cagnacci A, Arangino S, Renzi A, et al. Influence of melatonin administration on glucose tolerance and insulin sensitivity of postmenopausal women. Clin Endocrinol (Oxf) 2001;54:339-46.. PubMed
Williamson BL, Tomlinson AJ, Naylor S, Gleich GJ. Contaminants in commercial preparations of melatonin. Mayo Clin Proc 1997;72:1094-5. PubMed
Williamson BL, Tomlinson AJ, Mishra PK, et al. Structural characterization of contaminants found in commercial preparations of melatonin: similarities to case-related compounds from L-tryptophan associated with eosinophilia-myalgia syndrome. Chem Res To
Stewart LS. Endogenous melatonin and epileptogenesis: facts and hypothesis. Int J Neurosci 2001;107:77-85.. PubMed
Molina-Carballo A, Munoz-Hoyos A, Reiter RJ, et al. Utility of high doses of melatonin as adjunctive anticonvulsant therapy in a child with severe myoclonic epilepsy: two years' experience. J Pineal Res 1997;23:97-105.. PubMed
Tjon Pian Gi CV, Broeren JP, Starreveld JS, A Versteegh FG. Melatonin for treatment of sleeping disorders in children with attention deficit/hyperactivity disorder: a preliminary open label study. Eur J Pediatr 2003;162:554-5. PubMed
Secreto G, Chiechi LM, Amadori A, et al. Soy isoflavones and melatonin for the relief of climacteric symptoms: a multicenter, double-blind, randomized study. Maturitas 2004;47:11-20. PubMed
Weiss MD, Wasdell MB, Bomben MM, et al. Sleep hygiene and melatonin treatment for children and adolescents with ADHD and initial insomnia. J Am Acad Child Adolesc Psychiatry 2006;45:512-9. DOI
Saha L, Malhotra S, Rana S, et al. A preliminary study of melatonin in irritable bowel syndrome. J Clin Gastroenterol 2007;41:29-32. PubMed
Hussain, SA, Khadim, HM, Khalaf, BH, et al. Effects of melatonin and zinc on glycemic control in type 2 diabetic patients poorly controlled with metformin. Saudi Med J 2006;27:1483-8. DOI
Kadhim, HM, Ismail, SH, Hussein, KI, et al. Effects of melatonin and zinc on lipid profile and renal function in type 2 diabetic patients poorly controlled with metformin. J Pineal Res 2006;41:189-93. PubMed
Mutluay R. Elbeg S. Karakus R. et al. The Impact of Melatonin on Glucose Homeostasis. Turkish Journal of Endocrinology and Metabolism 2009;13:52-55.
Wright KP Jr, Badia P, Myers BL, et al. Caffeine and light effects on nighttime melatonin and temperature levels in sleep-deprived humans. Brain Res. 1997;747(1):78-84. PubMed
Peuhkuri K, Sihvola N, Korpela R. Dietary factors and fluctuating levels of melatonin. Food Nutr Res. 2012;56. doi: 10.3402/fnr.v56i0.17252. Epub 2012 Jul 20. PubMed
Gibb JW, Bush L, Hanson GR. Exacerbation of methamphetamine-induced neurochemical deficits by melatonin. J Pharmacol Exp Ther. 1997;283(2):630-5. DOI
Sunami E, Usuda K, Nishiyama Y, et al. A preliminary study of fluvoxamine maleate on depressive state and serum melatonin levels in patients after cerebral infarction. Intern Med. 2012;51(10):1187-93. PubMed
Babkoff, H., French, J., Whitmore, J., and Sutherlin, R. Single-dose bright light and/or caffeine effect on nocturnal performance. Aviat.Space Environ.Med. 2002;73(4):341-350.
Rossignol, D. A. Novel and emerging treatments for autism spectrum disorders: a systematic review. Ann.Clin Psychiatry 2009;21(4):213-236. DOI
Yeleswaram, K., Vachharajani, N., and Santone, K. Involvement of cytochrome P-450 isozymes in melatonin metabolism and clinical implications. J Pineal Res 1999;26(3):190-191. PubMed
Jan, J. E., Connolly, M. B., Hamilton, D., Freeman, R. D., and Laudon, M. Melatonin treatment of non-epileptic myoclonus in children. Dev.Med Child Neurol. 1999;41(4):255-259. PubMed
Edwards, B. J., Atkinson, G., Waterhouse, J., Reilly, T., Godfrey, R., and Budgett, R. Use of melatonin in recovery from jet-lag following an eastward flight across 10 time-zones. Ergonomics 2000;43(10):1501-1513. PubMed
Cagnacci, A., Arangino, S., Angiolucci, M., Melis, G. B., Facchinetti, F., Malmusi, S., and Volpe, A. Effect of exogenous melatonin on vascular reactivity and nitric oxide in postmenopausal women: role of hormone replacement therapy. Clin Endocrinol (Oxf PubMed
Wakatsuki, A., Okatani, Y., Ikenoue, N., Kaneda, C., and Fukaya, T. Effects of short-term melatonin administration on lipoprotein metabolism in normolipidemic postmenopausal women. Maturitas 4-20-2001;38(2):171-177. PubMed
Kitajima, T., Kanbayashi, T., Saitoh, Y., Ogawa, Y., Sugiyama, T., Kaneko, Y., Sasaki, Y., Aizawa, R., and Shimisu, T. The effects of oral melatonin on the autonomic function in healthy subjects. Psychiatry Clin Neurosci. 2001;55(3):299-300. PubMed
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Medication overviews come from MedlinePlus (NIH); supplement label data from the NIH Dietary Supplement Label Database. Content is written and reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

Pharmacist Counseling Corner

Taking Melatonin and Sulfacytine Together: Common Questions

Is it safe to take Melatonin with Sulfacytine?

We do not list a known interaction between Melatonin and Sulfacytine. That does not guarantee the combination is risk-free, so confirm with your pharmacist or doctor — especially if you take other medications or have a health condition.

How was the Melatonin and Sulfacytine combination checked?

Interactions in our licensed database are recorded against drug classes. Sulfacytine is filed under 1 classification, and Melatonin has documented interactions with 18 drug classes — none of Sulfacytine's classifications are among them. A medication can belong to classes beyond those recorded in our dataset, so this describes how the check was run rather than guaranteeing safety.

Does Melatonin interact with any other medications?

Yes. Melatonin has 1,461 documented drug interactions in our database — Sulfacytine is simply not one of them. If you take anything else, it is worth checking each one; they are all listed on this page.

Does Sulfacytine interact with any supplements?

Yes. Sulfacytine has documented interactions with 17 supplements in our database — Melatonin is not one of them. The Sulfacytine interaction page linked on this page lists every one, ranked by severity.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

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This information is for education only and is not a substitute for professional medical advice. Always check with your pharmacist or doctor before starting, stopping, or combining supplements and medications.