Serine + Cyproheptadine
Cyproheptadine brand name: Periactin.
We found no known interaction between Serine and Cyproheptadine 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. Additionally, although there is no interaction, the two are separately associated with some of the same side effects, which would make a new symptom harder to attribute to one or the other.
Serine and Cyproheptadine
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 Cyproheptadine and Serine 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.
Worth understanding: our licensed dataset holds no drug-interaction record for Serine at all — not against Cyproheptadine, and not against any other medication we track. This verdict therefore rests on the absence of any recorded data, not on research that looked at this combination and found nothing. We cannot rule an interaction out.
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.
Serine safety at a glance
Safety guidance is general; always confirm with your pharmacist or doctor for your situation.
Questions About Serine or Cyproheptadine
These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Serine or Cyproheptadine, 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.
See Every Supplement That Interacts With Cyproheptadine
This page covers Serine only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Cyproheptadine page lists 72 supplements it has a documented interaction with, worst first, each one explained.
The most serious there right now: Activated Charcoal (major), Henbane (major), Scopolia (major), Alfalfa (moderate) and Angel's Trumpet (moderate).
By severity: 3 major · 57 moderate · 12 minor.
From our pharmacist’s overview on the Cyproheptadine page
“Cyproheptadine (Periactin) is an older antihistamine that dries you out and slows you down on its own, which is exactly why its supplement list warrants genuine care rather than a quick skim. Of the 72 ingredients on file, three carry a major rating.”
Reviewed by 2 · Jul 18, 2026
Taking Serine as Part of a Dietary Supplement Product? Check It for Interactions
We hold 898 real supplement products containing Serine, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Serine. Even though Serine itself has no known interaction with Cyproheptadine, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:
Where Serine and Cyproheptadine 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.
#279 of 1,452 supplements looked up here in the last 7 days
#411 of 2,830 medications looked up here in the last 7 days
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 Serine reference on this page ↓
- Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Serine and Cyproheptadine 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.
About Serine
What is Serine?
- Memory and brain health
- Nervous system disorders (e.g., ALS research)
- Mood and stress support
- Sleep support
- General supplementation for the nervous system
Serine is an amino acid your body can make on its own and also gets from protein-rich foods, so most people do not need a supplement. L-serine has been studied for certain neurological conditions like ALS, but the evidence is still early and far from proven. If you are considering a serine supplement, talk with your pharmacist or doctor first.
Amino acid (made by the body and found in protein foods) · Capsules, powder, tablets; available as L-serine and phosphatidylserine
An interaction check asks whether these two react with each other — it does not ask whether Serine is a good idea for someone in your situation. Here is what our Serine record says about it on its own.
Serine: dosing
There is no well-established standard dose of serine for general supplement use. Doses used in research, especially for neurological conditions, vary widely and were given under medical supervision, so they should not be copied at home.If you choose to take a serine product, follow the directions on the label and do not exceed the recommended amount.
From our Serine monograph — the full record covers uses, side effects and every documented interaction.
About Cyproheptadine
What Is Cyproheptadine Used For?
Brand name: Periactin
Cyproheptadine treats a range of allergic conditions, including perennial and seasonal allergic rhinitis (year-round or seasonal nasal allergies), vasomotor rhinitis (non-allergic nasal symptoms), and allergic conjunctivitis (itchy, watery eyes caused by allergens or foods). It also helps with allergic skin reactions such as urticaria (hives) and angioedema (skin swelling).
Additional uses include cold urticaria (hives triggered by cold), dermatographism (skin that hives when scratched), and helping to calm allergic reactions to blood or plasma transfusions. It is also used as a supportive therapy alongside epinephrine after a severe allergic reaction (anaphylaxis) has been initially controlled.
Other Drugs & Serine
Browse every other medication we’ve checked against Serine — both the ones with a known interaction and the ones without. Select any drug for the full detail.
No drugs match “”.
No interaction 2,829 drugs checked — show the list
We also checked Serine against these medications and found no known interaction in our sources. Open any page to confirm.
- Apixaban ›
- Levothyroxine ›
- Amlodipine ›
- Methylphenidate ›
- Warfarin ›
- Sertraline ›
- Testosterone ›
- Ivermectin ›
- Losartan Potassium ›
- Aspirin ›
- Abemaciclib ›
- Acetaminophen ›
- Metoprolol ›
- Rosuvastatin ›
- Rivaroxaban ›
- Escitalopram ›
- Clopidogrel ›
- Atorvastatin ›
- Docusate ›
- Tadalafil ›
- Tirzepatide ›
- Methamphetamine ›
- Ibuprofen ›
- Warfarin Sodium ›
- Valacyclovir ›
- Hydroxyurea ›
- Sumatriptan ›
- Semaglutide ›
- Prednisone ›
- Propranolol ›
- Lisdexamfetamine ›
- Amitriptyline ›
- Metformin ›
- Amoxicillin ›
- Lisinopril ›
- Isotretinoin ›
- Amlodipine Besylate ›
- Methotrexate ›
- Bendamustine ›
- Bupropion ›
- Amphetamine ›
- Doxycycline ›
- Fluoxetine ›
- Azithromycin ›
- Acyclovir ›
- Pregabalin ›
- Lamotrigine ›
- Dextroamphetamine ›
- Gabapentin ›
- Acetaminophen, Codeine ›
- Levothyroxine, Liothyronine ›
- Clonazepam ›
- Quetiapine ›
- Naproxen ›
- Omeprazole ›
- Letrozole ›
- Duloxetine ›
- Methylene Blue ›
- Buspirone ›
- Citalopram ›
Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full Serine list.
Serine References
The 3 references that drive our Serine 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.
- Fridman V, Suriyanarayanan S, Novak P, et al. Randomized trial of l-serine in patients with hereditary sensory and autonomic neuropathy type 1. Neurology. 2019;92(4):e359-e370.
- Kantrowitz JT, Malhotra AK, Cornblatt B, et al. High dose D-serine in the treatment of schizophrenia. Schizophr Res. 2010 Aug;121(1-3):125-30. PubMed
- Levine TD, Miller RG, Bradley WG, et al. Phase I clinical trial of safety of L-serine for ALS patients. Amyotroph Lateral Scler Frontotemporal Degener. 2017;18(1-2):107-111. PubMed
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.
Taking Serine and Cyproheptadine Together: Common Questions
Is it safe to take Serine with Cyproheptadine?
Do Serine and Cyproheptadine have any of the same side effects?
Does Cyproheptadine interact with any supplements?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
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Still Have a Question About Cyproheptadine and Serine?
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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.