Interactions on record — worth a quick check against your medications. Based on 2 of 3 ingredients. Check your meds →
Dietary supplement

Phos-Drops Ingredients & Drug Interactions

by Nutri-West

Phos-Drops label
See full label image
Liquid Category: Other Combinations
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Phos-Drops 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

The interaction bottom line Most serious interaction: Moderate

Phos-Drops is a dietary supplement by Nutri-West with 3 active ingredients. Its ingredients are commonly taken for polycystic ovary syndrome (pcos), anxiety and panic, depression and mood.Based on those ingredients, 102 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Inositol, Choline. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Phos-Drops by Nutri-West

Ask about any prescription or over-the-counter medication and we check it for interactions with Phos-Drops by Nutri-West — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Phos-Drops by Nutri-West

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.

From our pharmacy team — supplement deep dive

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Sep 3, 2026

What’s inside

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 3 of its 3 active ingredients.
  • No proprietary blends here — you can verify the dose of every single component.

Phos-Drops contains 3 active ingredients: inositol, choline, and phosphorus. Inositol is a naturally occurring compound your body uses to help regulate blood sugar and support nerve and hormone function.

Choline is an essential nutrient involved in brain health and cell structure. Phosphorus works alongside calcium to support bone health and energy production.

The product is delivered in liquid form with deionized water as the inactive ingredient.

Does it work?

Moderate evidence
Evidence for Intended Use · database check
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed

This product doesn't appear to be marketed for a specific use, so we graded its ingredients' overall clinical evidence instead.

Moderate

Some clinical evidence supports its ingredients for:

Why this rating?
  • We looked at the product name, claims, and label statements and couldn't find a stated purpose to grade.
  • Since the label doesn't commit to one use, we graded the ingredients' overall clinical evidence instead.
  • On file: Polycystic ovary syndrome (PCOS) — rated "Possibly Effective" (Inositol) (Natural Medicines).
  • On file: Preterm labor — rated "Possibly Effective" (Inositol) (Natural Medicines).
  • On file: Metabolic syndrome — rated "Possibly Effective" (Inositol) (Natural Medicines).

Inositol has the strongest evidence base here: it's rated Possibly Effective for polycystic ovary syndrome (PCOS) and metabolic syndrome, and Possibly Effective for preterm labor. However, it's rated Possibly Ineffective for anxiety, diabetic nerve pain, and depression.

For choline, the evidence we hold isn't established—it's rated Insufficient Reliable Evidence for athletic performance, age-related cognitive decline, liver health during IV nutrition, hay fever, and Alzheimer's disease. There's no effectiveness data on file for phosphorus.

The evidence, ingredient by ingredient Inositol Choline

How safe is it?

Well-documented data
Safety Information · database check
Well characterized

Adverse-effect, pregnancy, and general safety data are on file for most of these ingredients.

Why this rating?
  • We hold adverse-effect (side-effect) data for 2 of the 2 matched ingredients.
  • Pregnancy & breastfeeding safety ratings cover 2 of 2.
  • General safety write-ups exist for 2 of 2.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Inositol is generally well tolerated at typical doses, though some people report mild digestive side effects like diarrhea, gas, and nausea. When used with omega-3 fatty acids, a small number of trial participants reported cold and allergy symptoms.

Inositol in pregnancy is rated Possibly Safe, but use only under medical supervision since full safety data isn't established yet. Choline is Likely Safe in pregnancy and lactation, though choline needs increase while breastfeeding—follow your doctor's guidance on dosing.

At high doses (9 grams daily and above), choline can cause fishy body odor, nausea, vomiting, sweating, and diarrhea; the daily upper limit is 3.5 grams.

Side effects, ingredient by ingredient Inositol Choline

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.

Why this rating?
  • 2 of the 2 matched ingredients can interact with medications — Inositol, Choline.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: diabetes medications.
  • For scale: 102 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.

Before taking Phos-Drops, check with your doctor or pharmacist if you take antidiabetes drugs (blood sugar medications)—inositol may increase the risk of low blood sugar, a Moderate concern. Also double-check if you take atropine, since choline may reduce its effects in the brain.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with some supporting evidence behind its ingredients' uses. Moderate medication interactions have been identified, and safety information is well characterized.

Phos-Drops may be worth considering if you're interested in supporting PCOS, metabolic syndrome, or preterm labor under your doctor's care, since inositol has some evidence for those uses. If you take diabetes medication or atropine, check with your doctor or pharmacist before starting—the interactions could affect how your drugs work.

Talk it over with your own healthcare provider to make sure it fits your situation.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 2 of 3 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Sep 24, 2021.

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

At a glance

General information

Key facts about Phos-Drops, straight from the product label.

Brand Nutri-West
Net contents 2 Ounce(s); 59.14 mL
Market status On market
Date entered into DSLD Sep 24, 2021
DSLD ID 252326
Product type Other Combinations
Supplement form Liquid
Dietary claims / uses All Other
Intended target group(s) Adult (18 - 50 Years)
From the label
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 Phos-Drops by Nutri-West, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
30 Drop(s)
Maximum serving Sizes:
30 Drop(s)
IngredientAmount% DV
Inositol16 mg--
Choline11 mg2%
Phosphorus390 mg39%

Other ingredients: deionized Water

Tap any ingredient to jump to its full detail below.

Label statements
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

For distribution by health care professionals only.

“When you want the best”

Storage

Store in cool, dry place.

Precautions

Keep out of reach of children.

Tamper resistant outer seal – do not use if broken.

FDA Statement of Identity

Dietary Supplement

Is this label outdated? Report a formula or label change and our pharmacy team will review it.

See for yourself

Phos-Drops by Nutri-West label

The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.

Phos-Drops label

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)
What’s inside

The Ingredients in Phos-Drops by Nutri-West

These are the 3 active ingredients this product is made of. Select any to open its full monograph.

Serving size30 Drop(s) Dosage formLiquid Amounts shown are per serving.

Most supplement products combine several ingredients, and a medication can interact with the product through any one of them. Each ingredient below shows whether it has known drug interactions.

Inositol

Interacts with
86 drugs
16 mg per serving

Inositol is a sugar alcohol made naturally in the body and found in many foods, and it is sold as a supplement (often myo-inositol) mainly for PCOS, m...

Inositol monograph & interactions

Choline

Interacts with
16 drugs
11 mg per serving Form: Choline Bitartrate

Choline is an essential nutrient your body needs for liver function, brain health, and nerve signaling, and many people get enough from foods like egg...

Choline monograph & interactions

Phosphorus

390 mg per serving Form: Orthophosphoric Acid

Other (inactive) ingredients: Deionized Water. These complete the product’s ingredient list but are not active constituents.

Interaction report

Phos-Drops by Nutri-West Drug Interactions

Want to check YOUR meds against Phos-Drops?

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 checker
102Drugs
86 Moderate 16 Minor

Ingredients driving the most interactions

Inositol 86
Choline 16

Individual Drug Interactions

The ingredients in Phos-Drops interact with 102 drugs. Click any drug to see the details.

2 of the 3 ingredients in Phos-Drops interact with drugs. Each result below shows which ingredient is responsible. Inositol Choline

Each ingredient & the kinds of drugs it affects

For each ingredient in Phos-Drops with known interactions, here are the types of medications they can affect. Open any type for the detail — or search your exact drug in the checker above.

Inositol1 drug type · 86 drugs

Antidiabetes Drugs

Theoretically, taking inositol with antidiabetes drugs might increase the risk of hypoglycemia.
Clinical research shows that inositol lowers blood glucose levels and glycated hemoglobin (HbA1c) levels in patients with diabetes.

Likelihood Possible Evidence A
Inositol full monograph & interactions

Choline1 drug type · 16 drugs

Atropine

Theoretically, choline might decrease the effects of atropine in the brain.
Animal research shows that administering choline one hour before administering atropine can attenuate atropine-induced decreases in brain levels of acetylcholine. Theoretically, concomitant use of choline and atropine may decrease the effects of atropine.

Likelihood Possible Evidence D
Choline full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Phos-Drops, from the product label.

Nutri-West

See all Nutri-West products
Name
Nutri-West
Street Address
P.O. Box 950
City
Douglas
State
WY
ZipCode
82633
Pharmacist Counseling Corner

Phos-Drops by Nutri-West: Common Questions

Does Phos-Drops by Nutri-West interact with any medications?
Yes. Based on its ingredients, Phos-Drops has a known interaction with 102 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Phos-Drops contains 3 active ingredients, and an interaction can come from any of them. We check every ingredient, combine the results into one list per medication, and show which ingredient and mechanism is responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Is it safe to take Phos-Drops while pregnant?
Inositol is rated Possibly Safe in pregnancy but should be used only under medical supervision since full safety data isn't established. Choline is Likely Safe and is actually important during pregnancy, though follow your doctor's advice on dosing. Talk with your doctor or pharmacist about whether this product is right for you during pregnancy.
Can inositol really help with PCOS?
Inositol in Phos-Drops is rated Possibly Effective for PCOS based on available evidence. It's also rated Possibly Effective for metabolic syndrome and preterm labor. However, 'possibly effective' means the evidence is encouraging but not definitive, so talk with your doctor about whether it's a good fit for your situation.
What side effects should I watch for?
Inositol most commonly causes mild digestive issues—diarrhea, gas, and nausea. Choline at typical doses is well tolerated, but at high doses it can cause fishy body odor, nausea, vomiting, sweating, and diarrhea. If you notice any of these, cut back and talk with your pharmacist or doctor.
Is Phos-Drops safe while breastfeeding?
Choline is Likely Safe while breastfeeding and is actually more important during that time—but follow your doctor's guidance on how much to take. There's not enough data on file for inositol during breastfeeding, so check with your doctor or pharmacist before using this product if you're nursing.
What does each ingredient in this product do?
Inositol helps regulate blood sugar and supports nerve and hormone function. Choline is essential for brain health and cell structure. Phosphorus works with calcium to support bone health and energy production. Together, they're designed to support metabolic and nutritional needs, though the evidence is strongest for inositol.

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

Not sure if Phos-Drops is safe with your meds?

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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.

Phos-Drops label
Go deeper

The Full Monographs Behind Phos-Drops’s Ingredients

Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.

Herb & supplement monograph

Inositol

Interacts with 86 drugs

Inositol is a sugar alcohol made naturally in the body and found in many foods, and it is sold as a supplement (often myo-inositol) mainly for PCOS, mood, and metabolic concerns. The stronge...

Read the full Inositol monograph → Herb & supplement monograph

Choline

Interacts with 16 drugs

Choline is an essential nutrient your body needs for liver function, brain health, and nerve signaling, and many people get enough from foods like eggs, meat, and fish. Supplements may help...

Read the full Choline monograph →
Sources

Sources & How We Checked

Phos-Drops'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.

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 28 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.

Inositol 14 references
  1. Palatnik A, Frolov K, Fux M, Benjamin J. Double-blind, controlled, crossover trial of inositol versus fluvoxamine for the treatment of panic disorder. J Clin Psychopharmacol 2001;21:335-9.. PubMed
  2. Allan SJ, Kavanagh GM, Herd RM, Savin JA. The effect of inositol supplements on the psoriasis of patients taking lithium: a randomized, placebo-controlled trial. Br J Dermatol 2004;150:966-9. PubMed
  3. Machado-Vieira R, Viale CI, Kapczinski F. Mania associated with an energy drink: the possible role of caffeine, taurine, and inositol. Can J Psychiatry 2001;46:454-5. PubMed
  4. Kamenov Z, Kolarov G, Gateva A, Carlomagno G, Genazzani AD. Ovulation induction with myo-inositol alone and in combination with clomiphene citrate in polycystic ovarian syndrome patients with insulin resistance. Gynecol Endocrinol 2015;31(2):131-5. PubMed
  5. Matarrelli B, Vitacolonna E, D'Angelo M, et al. Effect of dietary myo-inositol supplementation in pregnancy on the incidence of maternal gestational diabetes mellitus and fetal outcomes: a randomized controlled trial. J Matern Fetal Neonatal Med 2013;26(1 PubMed
  6. Mukai T, Kishi T, Matsuda Y, Iwata N. A meta-analysis of inositol for depression and anxiety disorders. Hum Psychopharmacol 2014;29(1):55-63. PubMed
  7. Farren M, Daly N, McKeating A, Kinsley B, Turner MJ, Daly S. The Prevention of Gestational Diabetes Mellitus With Antenatal Oral Inositol Supplementation: A Randomized Controlled Trial. Diabetes Care. 2017;40(6):759-63. PubMed
  8. Zheng X, Liu Z, Zhang Y, et al. Relationship Between Myo-Inositol Supplementary and Gestational Diabetes Mellitus: A Meta-Analysis. Medicine (Baltimore). 2015;94(42):e1604. PubMed
  9. Crawford TJ, Crowther CA, Alsweiler J, Brown J. Antenatal dietary supplementation with myo-inositol in women during pregnancy for preventing gestational diabetes. Cochrane Database Syst Rev. 2015;(12):CD011507. PubMed
  10. Maurizi AR, Menduni M, Del Toro R, et al. A pilot study of D-chiro-inositol plus folic acid in overweight patients with type 1 diabetes. Acta Diabetol. 2017;54(4):361-65. PubMed
  11. Leppink EW, Redden SA, Grant JE. A double-blind, placebo-controlled study of inositol in trichotillomania. Int Clin Psychopharmacol. 2017;32(2):107-14. PubMed
  12. Lam S, Mandrekar SJ, Gesthalter Y. A Randomized Phase IIb Trial of myo-Inositol in Smokers with Bronchial Dysplasia. Cancer Prev Res (Phila). 2016;9(12):906-14.
  13. Wozniak J, Faraone SV, Chan J, et al. A randomized clinical trial of high eicosapentaenoic acid omega-3 fatty acids and inositol as monotherapy and in combination in the treatment of pediatric bipolar spectrum disorders: a pilot study. J Clin Psychiatry. PubMed
  14. Vitale SG, Corrado F, Caruso S, et al. Myo-inositol supplementation to prevent gestational diabetes in overweight non-obese women: bioelectrical impedance analysis, metabolic aspects, obstetric and neonatal outcomes - a randomized and open-label, placebo-

See these in context on the Inositol monograph →

Choline 14 references
  1. Yates AA, Schlicker SA, Suitor CW. Dietary reference intakes: The new basis for recommendations for calcium and related nutrients, B vitamins, and choline. J Am Diet Assoc 1998;98:699-706. PubMed
  2. Cho E, Willett WC, Colditz GA, et al. Dietary choline and betaine and the risk of distal colorectal adenoma in women. J Natl Cancer Inst 2007;99:1224-31. PubMed
  3. Schmidt, C., Abicht, A., Krampfl, K., Voss, W., Stucka, R., Mildner, G., Petrova, S., Schara, U., Mortier, W., Bufler, J., Huebner, A., and Lochmuller, H. Congenital myasthenic syndrome due to a novel missense mutation in the gene encoding choline acetyl
  4. Tamminga, C., Smith, R. C., Chang, S., Haraszti, J. S., and Davis, J. M. Depression associated with oral choline. Lancet 10-23-1976;2(7991):905. PubMed
  5. Wood, J. L. and Allison, R. G. Effects of consumption of choline and lecithin on neurological and cardiovascular systems. Fed.Proc. 1982;41(14):3015-3021.
  6. Growdon, J. H. and Gelenberg, A. J. Choline and lecithin administration to patients with tardive dyskinesia. Trans.Am.Neurol.Assoc. 1978;103:95-99.
  7. Smith, C. M., Swash, M., Exton-Smith, A. N., Phillips, M. J., Overstall, P. W., Piper, M. E., and Bailey, M. R. Choline therapy in Alzheimer's disease. Lancet 8-5-1978;2(8084):318. PubMed
  8. Morrison, L. M. and W. F. Gonzales. Choline in coronary atherosclerosis. Amer.Heart J. 1950;39:729.
  9. Christie, J. G. Blackburn 1. M. Glen A. I. M. Zeisel S. Shering A. & Yates C. M. Effects of choline and lecithin on CSF choline levels and on cognitive functioning in patients with presenile dementia of the Alzheimer type. Nutrition and the brain 1979;5
  10. Sidhu N, Davies S, Nadarajah A, et al. Oral choline supplementation for postoperative pain. Br J Anaesth 2013;111(2):249-55. PubMed
  11. Wozniak JR, Fuglestad AJ, Eckerle JK, et al. Choline supplementation in children with fetal alcohol spectrum disorders has high feasibility and tolerability. Nutr Res. 2013;33(11):897-904. PubMed
  12. Wozniak JR, Fuglestad AJ, Eckerle JK, et al. Choline supplementation in children with fetal alcohol disorders: a randomized, double-blind, placebo-controlled trial. Am J Clin Nutr. 2015;102(5): 1113-25.
  13. Ross RG, Hunter SK, McCarthy L, et al. Perinatal choline effects on neonatal pathophysiology related to later schizophrenia risk. Am J Psychiatry. 2013;170(3):290-8. PubMed
  14. Food and Nutrition Board, Institute of Medicine. Choline. Dietary Reference Intakes: Thiamin, Riboflavin, Niacin, Vitamin B-6, Vitamin B-12, Pantothenic Acid, Biotin, and Choline. Washington D.C.: National Academy Press; 1998:390-422.

See these in context on the Choline monograph →

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

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