L-Tryptophan Ingredients & Drug Interactions
by Lidtke
What is this page for?
First and foremost: checking L-Tryptophan against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.
Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy
L-Tryptophan is a dietary supplement by Lidtke with 1 active ingredient. Its ingredients are commonly taken for sleep problems, low mood and depression, anxiety.Based on those ingredients, 394 medications have a known interaction with it, the most serious rated major. The ingredients most likely to interact are L-Tryptophan. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against L-Tryptophan by Lidtke
Ask about any prescription or over-the-counter medication and we check it for interactions with L-Tryptophan by Lidtke — and tell you which ingredient is responsible.
AI summaries are generated from our interaction database for education only — always confirm with your pharmacist. How we use AI
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HelloPharmacist Scorecard of L-Tryptophan by Lidtke
Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.
What’s inside
Full disclosure
This product contains one active ingredient: L-tryptophan, an amino acid your body uses to make serotonin, a chemical messenger involved in mood and sleep. The powder form allows flexible dosing.
There are no other inactive ingredients listed.
Does it work?
Not established
The evidence on L-tryptophan for the conditions it's marketed for is mixed. For depression, the data rates it as possibly ineffective.
For anxiety, athletic performance, teeth grinding (bruxism), and premenstrual dysphoric disorder, there isn't enough reliable evidence to know whether it works. If you're considering this product for a specific health concern, talk with your doctor about whether the evidence supports its use for your situation.
How safe is it?
Well-documented data
L-Tryptophan is generally well tolerated by mouth, though it can cause belching, diarrhea, drowsiness, dry mouth, flatulence, headache, heartburn, lightheadedness, nausea, stomach pain, blurred vision, and vomiting. The product comes with a cautionary note about past contamination issues: in 1989, a batch of L-tryptophan from a Japanese manufacturer was linked to more than 1,500 cases of a serious neurological condition called eosinophilia-myalgia syndrome (EMS).
Most modern products are considered safe from that specific source, but it's something to be aware of. The safety data advises against L-tryptophan during pregnancy and while breastfeeding.
If you are pregnant, planning pregnancy, or breastfeeding, talk with your doctor or pharmacist before starting this product.
Meds to double-check
Major interaction found
Before taking L-Tryptophan, double-check with your doctor or pharmacist if you take CNS depressants (sedatives, sleep aids, opioids, or some pain relievers)—risk of increased drowsiness is Major. Also confirm if you're on serotonergic drugs like antidepressants or certain migraine or pain medications—risk is Moderate and includes possible serotonin syndrome.
The bottom line
Scorecard at a glanceFully disclosed formula with no established evidence rating for its marketed use. Major medication interactions have been identified, and safety information is well characterized.
L-Tryptophan may be worth considering if you're exploring options for mood or sleep and your doctor agrees the evidence fits your situation—but it's not a proven treatment for depression or anxiety. The main caution is mixing it with sedatives or serotonin-based medications; if you take either category, check with your doctor or pharmacist before starting.
Pregnancy and breastfeeding are not ideal times for this supplement based on current safety data.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Mar 24, 2020.
This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed
General information
Key facts about L-Tryptophan, straight from the product label.
| Brand | Lidtke |
|---|---|
| Barcode (UPC) | 630610003759 |
| Net contents | 250 Gram(s) Powder |
| Market status | On market |
| Date entered into DSLD | Mar 24, 2020 |
| DSLD ID | 215289 |
| Product type | Amino Acid/protein |
| Supplement form | Powder |
| Dietary claims / uses | Nutrient, All Other, Structure/Function |
| Intended target group(s) | Adult (18 - 50 Years) |
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.
Supplement Facts
The label details for L-Tryptophan by Lidtke, sourced from the NIH Dietary Supplement Label Database.
Tap any ingredient to jump to its full detail below.
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
General Statements
Thank you for choosing L-Tryptophan by Lidtke. We sincerely wish the best of health for you and your family.
Purest on the planet Superb quality since 1994
As certified by the manufacturer.
Formulation
L-Tryptophan is a natural building block of serotonin, the neurotransmitter that plays an important role in appetite, mood, normal sleep patterns, and nervous-system health. When your body needs extra help producing serotonin for peaceful sleep and a more relaxed outlook, choose Lidtke L-Tryptophan. Lidtke stands behind each product and guarantees customer satisfaction for 365 days from the date of purchase.
Sleep well, stay calm Supports healthy sleep & mood
No added gluten, yeast, wheat, corn, soy, dairy, eggs, tree nuts, peanuts, fish, shellfish, salt, sugar, artificial color or flavor, or preservatives. Non-GMO.
FDA Disclaimer Statement
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.
Precautions
Warning: Keep out of reach of children.
If you are pregnant, lactating, taking any medications (especially MAOIs, Tricyclics, or SSRIs), or have a medical condition, consult your doctor.
Discontinue use if adverse reaction occurs. Do not use if seal is damaged or missing.
Adverse events may be reported above.
Storage
Keep lid tightly closed. Keep in a cool, dry place.
Formula
L-Trytophan, USP
Seals/Symbols
GMP
FDA Statement of Identity
A Dietary Supplement
Suggested/Recommended/Usage/Directions
Directions (Adults): Take 1/3 level teaspoon or as directed by a health-care professional. Best if taken at bedtime or between meals.
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
L-Tryptophan by Lidtke label
The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.
Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.
View the full label (PDF)The Ingredients in L-Tryptophan by Lidtke
This is the 1 active ingredient this product is made of. Select it to open its full monograph.
Serving size0.33 tsp Dosage formPowder Servings per container500 Amounts shown are per serving.
L-Tryptophan
Interacts with394 drugs
L-tryptophan is an essential amino acid the body uses to make serotonin and melatonin, and people take it to support sleep and mood. The evidence for...
L-Tryptophan monograph & interactionsOther (inactive) ingredients: None. These complete the product’s ingredient list but are not active constituents.
L-Tryptophan by Lidtke Drug Interactions
HelloPharmacist Interaction Report
L-Tryptophan by Lidtke can interact with medications, primarily through two major drug categories.
The most serious concern is with CNS depressants—medications that slow your brain and nervous system, like sedatives, sleep aids, and some pain relievers. Taking L-tryptophan alongside these can add to their sedative effects and increase drowsiness and fatigue, which L-tryptophan itself can cause.
Read the full breakdown — every affected drug type, severity by severity
L-Tryptophan also interacts with serotonergic drugs—medications that work through serotonin, including many antidepressants, some migraine drugs, and certain pain relievers. Because L-tryptophan is a building block for serotonin, combining it with these drugs might increase serotonin-related side effects, including a rare but serious condition called serotonin syndrome.
Additionally, we could not check interactions for other ingredient categories that may appear on the label. Altogether, these interactions span 394 individual medications.
Before you start this product, run your exact medications through the checker on this page or discuss them with your doctor or pharmacist.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against L-Tryptophan?
Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.
Go to the checkerIngredients driving the most interactions
Individual Drug Interactions
The ingredients in L-Tryptophan interact with 394 drugs. Click any drug to see the details.
1 of the 1 ingredient in L-Tryptophan interact with drugs. Each result below shows which ingredient is responsible. L-Tryptophan
AmitriptylineElavil
How Amitriptyline interacts with L-Tryptophan — through 1 ingredient. Tap an ingredient for the detail:
L-tryptophanCns Depressants, Serotonergic Drugs Major
Interaction Summary
Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.
Read the full L-tryptophan + Amitriptyline interactionAmitriptyline, ChlordiazepoxideLimbitrol DS
How Amitriptyline, Chlordiazepoxide interacts with L-Tryptophan — through 1 ingredient. Tap an ingredient for the detail:
L-tryptophanSerotonergic Drugs, Cns Depressants Major
Interaction Summary
Theoretically, combining L-tryptophan with serotonergic drugs might cause additive serotonergic effects.
Read the full L-tryptophan + Amitriptyline, Chlordiazepoxide interactionAmitriptyline, PerphenazineEtrafon, Etrafon-A, Etrafon-Forte, Triavil
How Amitriptyline, Perphenazine interacts with L-Tryptophan — through 1 ingredient. Tap an ingredient for the detail:
L-tryptophanCns Depressants, Serotonergic Drugs Major
Interaction Summary
Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.
Read the full L-tryptophan + Amitriptyline, Perphenazine interactionAmobarbitalAmytal
How Amobarbital interacts with L-Tryptophan — through 1 ingredient. Tap an ingredient for the detail:
L-tryptophanCns Depressants Major
Interaction Summary
Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.
Read the full L-tryptophan + Amobarbital interactionAmobarbital, Ephedrine SulfateEphedrine & Amytal
How Amobarbital, Ephedrine Sulfate interacts with L-Tryptophan — through 1 ingredient. Tap an ingredient for the detail:
L-tryptophanCns Depressants Major
Interaction Summary
Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.
Read the full L-tryptophan + Amobarbital, Ephedrine Sulfate interactionAmobarbital, SecobarbitalTuinal
How Amobarbital, Secobarbital interacts with L-Tryptophan — through 1 ingredient. Tap an ingredient for the detail:
L-tryptophanCns Depressants Major
Interaction Summary
Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.
Read the full L-tryptophan + Amobarbital, Secobarbital interactionAprobarbital, Butabarbital, PhenobarbitalTriple Barbital
How Aprobarbital, Butabarbital, Phenobarbital interacts with L-Tryptophan — through 1 ingredient. Tap an ingredient for the detail:
L-tryptophanCns Depressants Major
Interaction Summary
Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.
Read the full L-tryptophan + Aprobarbital, Butabarbital, Phenobarbital interactionAripiprazoleAbilify, Abilify Maintena, Abilify Mycite
How Aripiprazole interacts with L-Tryptophan — through 1 ingredient. Tap an ingredient for the detail:
L-tryptophanCns Depressants, Serotonergic Drugs Major
Interaction Summary
Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.
Read the full L-tryptophan + Aripiprazole interactionAripiprazole LauroxilAristada, Aristada Initio Kit
How Aripiprazole Lauroxil interacts with L-Tryptophan — through 1 ingredient. Tap an ingredient for the detail:
L-tryptophanSerotonergic Drugs, Cns Depressants Major
Interaction Summary
Theoretically, combining L-tryptophan with serotonergic drugs might cause additive serotonergic effects.
Read the full L-tryptophan + Aripiprazole Lauroxil interactionAspirin, Butalbital, Caffeine, Codeine PhosphateFiorinal w/ Codeine
How Aspirin, Butalbital, Caffeine, Codeine Phosphate interacts with L-Tryptophan — through 1 ingredient. Tap an ingredient for the detail:
L-tryptophanCns Depressants Major
Interaction Summary
Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.
Read the full L-tryptophan + Aspirin, Butalbital, Caffeine, Codeine Phosphate interactionAspirin, Caffeine, Codeine PhosphateAnacin w/ Codeine
How Aspirin, Caffeine, Codeine Phosphate interacts with L-Tryptophan — through 1 ingredient. Tap an ingredient for the detail:
L-tryptophanCns Depressants Major
Interaction Summary
Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.
Read the full L-tryptophan + Aspirin, Caffeine, Codeine Phosphate interactionAspirin, Caffeine, Dihydrocodeine BitartrateSynalgos DC
How Aspirin, Caffeine, Dihydrocodeine Bitartrate interacts with L-Tryptophan — through 1 ingredient. Tap an ingredient for the detail:
L-tryptophanCns Depressants Major
Interaction Summary
Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.
Read the full L-tryptophan + Aspirin, Caffeine, Dihydrocodeine Bitartrate interactionAspirin, Caffeine, HydrocodoneDamason-P
How Aspirin, Caffeine, Hydrocodone interacts with L-Tryptophan — through 1 ingredient. Tap an ingredient for the detail:
L-tryptophanCns Depressants Major
Interaction Summary
Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.
Read the full L-tryptophan + Aspirin, Caffeine, Hydrocodone interactionAspirin, Caffeine, Phenacetin, PropoxypheneMargesic Comp. 65
How Aspirin, Caffeine, Phenacetin, Propoxyphene interacts with L-Tryptophan — through 1 ingredient. Tap an ingredient for the detail:
L-tryptophanCns Depressants Major
Interaction Summary
Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.
Read the full L-tryptophan + Aspirin, Caffeine, Phenacetin, Propoxyphene interactionAspirin, Carisoprodol, Codeine PhosphateSoma Compound w/ Codeine
How Aspirin, Carisoprodol, Codeine Phosphate interacts with L-Tryptophan — through 1 ingredient. Tap an ingredient for the detail:
L-tryptophanCns Depressants Major
Interaction Summary
Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.
Read the full L-tryptophan + Aspirin, Carisoprodol, Codeine Phosphate interactionAspirin, Codeine PhosphateAspirin w/ Codeine
How Aspirin, Codeine Phosphate interacts with L-Tryptophan — through 1 ingredient. Tap an ingredient for the detail:
L-tryptophanCns Depressants Major
Interaction Summary
Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.
Read the full L-tryptophan + Aspirin, Codeine Phosphate interactionAspirin, Codeine Phosphate, MethocarbamolRobaxisal C
How Aspirin, Codeine Phosphate, Methocarbamol interacts with L-Tryptophan — through 1 ingredient. Tap an ingredient for the detail:
L-tryptophanCns Depressants Major
Interaction Summary
Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.
Read the full L-tryptophan + Aspirin, Codeine Phosphate, Methocarbamol interactionAspirin, Codeine Phosphate, PhenobarbitalPhenaphen
How Aspirin, Codeine Phosphate, Phenobarbital interacts with L-Tryptophan — through 1 ingredient. Tap an ingredient for the detail:
L-tryptophanCns Depressants Major
Interaction Summary
Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.
Read the full L-tryptophan + Aspirin, Codeine Phosphate, Phenobarbital interactionAspirin, Diphenhydramine, PhenylpropanolamineAlka Seltzer Plus Night Time Effervescent
How Aspirin, Diphenhydramine, Phenylpropanolamine interacts with L-Tryptophan — through 1 ingredient. Tap an ingredient for the detail:
L-tryptophanCns Depressants Major
Interaction Summary
Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.
Read the full L-tryptophan + Aspirin, Diphenhydramine, Phenylpropanolamine interactionAspirin, Ethoheptazine, MeprobamateEquagesic
How Aspirin, Ethoheptazine, Meprobamate interacts with L-Tryptophan — through 1 ingredient. Tap an ingredient for the detail:
L-tryptophanCns Depressants Major
Interaction Summary
Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.
Read the full L-tryptophan + Aspirin, Ethoheptazine, Meprobamate interactionAspirin, HydrocodoneAlor 5 500, Lortab ASA
How Aspirin, Hydrocodone interacts with L-Tryptophan — through 1 ingredient. Tap an ingredient for the detail:
L-tryptophanCns Depressants Major
Interaction Summary
Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.
Read the full L-tryptophan + Aspirin, Hydrocodone interactionAspirin, OxycodonePercodan
How Aspirin, Oxycodone interacts with L-Tryptophan — through 1 ingredient. Tap an ingredient for the detail:
L-tryptophanCns Depressants Major
Interaction Summary
Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.
Read the full L-tryptophan + Aspirin, Oxycodone interactionAspirin, PentazocineTalwin Compound
How Aspirin, Pentazocine interacts with L-Tryptophan — through 1 ingredient. Tap an ingredient for the detail:
L-tryptophanCns Depressants Major
Interaction Summary
Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.
Read the full L-tryptophan + Aspirin, Pentazocine interactionAtropine, Hyoscyamine, PhenobarbitalHypnaldyne
How Atropine, Hyoscyamine, Phenobarbital interacts with L-Tryptophan — through 1 ingredient. Tap an ingredient for the detail:
L-tryptophanCns Depressants Major
Interaction Summary
Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.
Read the full L-tryptophan + Atropine, Hyoscyamine, Phenobarbital interactionAtropine, Hyoscyamine, Phenobarbital, ScopolamineBarbidonna No. 2, Belladonna Phenobarbital
How Atropine, Hyoscyamine, Phenobarbital, Scopolamine interacts with L-Tryptophan — through 1 ingredient. Tap an ingredient for the detail:
L-tryptophanCns Depressants Major
Interaction Summary
Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.
Read the full L-tryptophan + Atropine, Hyoscyamine, Phenobarbital, Scopolamine interactionAtropine, Hyoscyamine, Scopolamine, PhenobarbitalBarbeloid, Donnatal #2, Donphen
How Atropine, Hyoscyamine, Scopolamine, Phenobarbital interacts with L-Tryptophan — through 1 ingredient. Tap an ingredient for the detail:
L-tryptophanCns Depressants Major
Interaction Summary
Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.
Read the full L-tryptophan + Atropine, Hyoscyamine, Scopolamine, Phenobarbital interactionAtropine, PhenobarbitalAnthrocol
How Atropine, Phenobarbital interacts with L-Tryptophan — through 1 ingredient. Tap an ingredient for the detail:
L-tryptophanCns Depressants Major
Interaction Summary
Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.
Read the full L-tryptophan + Atropine, Phenobarbital interactionAtropine, MeperidineAtropine, Meperidine
How Atropine, Meperidine interacts with L-Tryptophan — through 1 ingredient. Tap an ingredient for the detail:
L-tryptophanCns Depressants, Serotonergic Drugs Major
Interaction Summary
Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.
Read the full L-tryptophan + Atropine, Meperidine interactionAtropine, Morphine SulfateAtropine, Morphine Sulfate
How Atropine, Morphine Sulfate interacts with L-Tryptophan — through 1 ingredient. Tap an ingredient for the detail:
L-tryptophanCns Depressants Major
Interaction Summary
Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.
Read the full L-tryptophan + Atropine, Morphine Sulfate interactionBelladona Extract, PhenobarbitalChardonna-2
How Belladona Extract, Phenobarbital interacts with L-Tryptophan — through 1 ingredient. Tap an ingredient for the detail:
L-tryptophanCns Depressants Major
Interaction Summary
Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.
Read the full L-tryptophan + Belladona Extract, Phenobarbital interactionEach ingredient & the kinds of drugs it affects
For each ingredient in L-Tryptophan with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.
L-Tryptophan
Cns Depressants
Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.
Clinical research shows that L-tryptophan can cause fatigue and drowsiness.
Serotonergic Drugs
Theoretically, combining L-tryptophan with serotonergic drugs might cause additive serotonergic effects.
L-tryptophan is a precursor to serotonin. Theoretically, combining serotonergic drugs with L-tryptophan might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders.
Brand information
Manufacturer and brand details for L-Tryptophan, from the product label.
Lidtke
See all Lidtke products- Name
- Lidtke Technologies
- City
- Casa Grande
- State
- AZ
- ZipCode
- 85122
- Phone Number
- 1-800-404-8185
L-Tryptophan by Lidtke: Common Questions
Does L-Tryptophan by Lidtke interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Can I take L-Tryptophan if I'm on an antidepressant?
Will L-Tryptophan help my depression?
What are the common side effects?
Is L-Tryptophan safe if I'm pregnant or breastfeeding?
Should I be concerned about the eosinophilia-myalgia syndrome cases I've heard about?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if L-Tryptophan is safe with your meds?
Our pharmacists answer your medication & supplement questions — free.
Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.
The Full Monographs Behind L-Tryptophan’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Sources & How We Checked
L-Tryptophan's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.
- NIH Dietary Supplement Label Database (DSLD) — The official product label on file for this supplement.
- Natural Medicines (Therapeutic Research Center) — Evidence-graded clinical reference behind the ingredient interaction data.
Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.
The 18 references behind this product’s interaction data
Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.
L-tryptophan 18 references
- Messiha FS. Fluoxetine: adverse effects and drug-drug interactions. J Toxicol Clin Toxicol 1993;31:603-30. PubMed
- Devoe LD, Castillo RA, Searle NS. Maternal dietary substrates and human fetal biophysical activity. The effects of tryptophan and glucose on fetal breathing movements. Am J Obstet Gynecol 1986;155:135-9. DOI
- Lieberman HR, Corkin S, Spring BJ. The effects of dietary neurotransmitter precursors on human behavior. Am J Clin Nutr 1985;42:366-70. PubMed
- U. S. Food and Drug Administration, Center for Food Safety and Applied Nutrition, Office of Nutritional Products, Labeling, and Dietary Supplements. Information Paper on L-Tryptophan and 5-hydroxy-L-tryptophan, February 2001.
- Sullivan EA, Kamb ML, Jones JL, et al. The natural history of eosinophilia-myalgia syndrome in a tryptophan-exposed cohort in South Carolina. Arch Intern Med 1996;156:973-9. DOI
- Philen RM, Hill RH, Flanders WD, et al. Tryptophan contaminants associated with eosinophilia-myalgia syndrome. Am J Epidemiol 1993;138:154-9. PubMed
- Bohme A, Wolter M, Hoelzer D. L-tryptophan-related eosinophilia-myalgia syndrome possibly associated with a chronic B-lymphocytic leukemia. Ann Hematol 1998;77:235-8. PubMed
- Singhal AB, Caviness VS, Begleiter AF, et al. Cerebral vasoconstriction and stroke after use of serotonergic drugs. Neurology 2002;58:130-3. PubMed
- Priori R, Conti F, Luan FL, et al. Chronic fatigue: a peculiar evolution of eosinophilia myalgia syndrome following treatment with L-tryptophan in four Italian adolescents. Eur J Pediatr 1994;153:344-6..
- Klein R, Berg PA. A comparative study on antibodies to nucleoli and 5-hydroxytryptamine in patients with fibromyalgia syndrome and tryptophan-induced eosinophilia-myalgia syndrome. Clin Investig 1994;72:541-9.. PubMed
- Simat TJ, Kleeberg KK, Muller B, Sierts A. Synthesis, formation, and occurrence of contaminants in biotechnologically manufactured L-tryptophan. Adv Exp Med Biol 1999;467:469-80.. PubMed
- Shaw K, Turner J, Del Mar C. Tryptophan and 5-hydroxytryptophan for depression. Cochrane Database Syst Rev 2002;(1):CD003198. PubMed
- Kilbourne EM, Philen RM, Kamb ML, Falk H. Tryptophan produced by Showa Denko and epidemic eosinophilia-myalgia syndrome. J Rheumatol Suppl 1996;46:81-8.
- Horwitz RI, Daniels SR. Bias or biology: evaluating the epidemiologic studies of L-tryptophan and the eosinophilia-myalgia syndrome. J Rheumatol Suppl 1996;46:60-72.
- Shapiro S. Epidemiologic studies of the association of L-tryptophan with the eosinophilia-myalgia syndrome: a critique. J Rheumatol Suppl 1996;46:44-58.
- Mayeno AN, Gleich GJ. The eosinophilia-myalgia syndrome: lessons from Germany. Mayo Clin Proc 1994;69:702-4. PubMed
- Carr L, Ruther E, Berg PA, Lehnert H. Eosinophilia-myalgia syndrome in Germany: an epidemiologic review. Mayo Clin Proc 1994;69:620-5. PubMed
- Ullrich SS, Fitzgerald PCE, Giesbertz P, Steinert RE, Horowitz M, Feinle-Bisset C. Effects of intragastric administration of tryptophan on the blood glucose response to a nutrient drink and energy intake, in lean and obese men. Nutrients 2018;10(4). pii: PubMed
Parts of this content are provided by the Therapeutic Research Center, LLC.
DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.
© 2021 Therapeutic Research Center, LLC