PharmaGuideThe supplement & medication co-pilot
Your supplements don't act in isolation.
Neither should your check.
Know whether this supplement is right for you — before it conflicts with your medications, conditions, or existing stack.
iPhone & Android app · free in beta · we're adding the first testers now
Example: adding a magnesium bisglycinate rated 92 for quality to a stack with levothyroxine flags a timing issue — separate them by at least 4 hours. A multivitamin, vitamin D3 and cod liver oil together total about 6,000 IU of vitamin D a day, above the adult upper limit of 4,000 IU.
Every claim traceable to sourceClinician-reviewed contentYour health profile is stored on your device
The problem
A label tells you what's in the bottle. Not what happens with your other bottles.
Googling “X with Y” usually gives you three different answers.
Most products are checked one at a time. That’s not how people take them.
Sometimes it’s not the ingredient. It’s the timing.
4,100+
ER visits per day from adverse drug events
CDC counts more than 1.5 million of them a year, led by blood thinners, diabetes medicines, and antibiotics. Supplements are a smaller, separate estimate. PharmaGuide works the blind spot they share: what people combine, and whether anyone checked.
The first step is knowing what overlaps.
Because interactions happen between products
— not in isolation.
How it works
Three beats. No guesswork.
From scan to verdict — find the product, check it against your stack, and understand what to do next.
- 01
Scan or search.
Find products instantly from a large on-device catalog, even offline or with weak signal.
Catalog · localofflineashwagandha 600 mg0.008 smagnesium glycinate0.006 srhodiola rosea0.011 sFrom 200,000+ NIH labelson-device · no cloud - 02
Check it against your stack.
PharmaGuide compares supplements, medications, timing, and health context to surface risks people usually miss. Core interaction checks run entirely on your device.
St. John's Wort ↔ sertraline
Contraindicated
Berberine ↔ metformin
Caution
Garlic ↔ warfarin
Monitor
- 03
Get two reads, not one.
Quality is what's in the bottle. Your fit is everything around it — your medications, conditions, and stack. Every flag shows its evidence and reasoning in plain language.
Magnesium Bisglycinate · 1 scoop
Quality92Excellent · NSF Certified for Sport
Your fitGood fitwith timing adjustment
Separate from levothyroxine by 4+ hours
The ladder
Not just warnings.
Reasoning.
Every verdict includes the reason, the evidence level, and what to do next. Hover or tap a tier.Tap a tier below.
Caution
Calcium + Levothyroxine
Reduced thyroid absorption
Mechanism
Calcium binds levothyroxine in the gut, reducing its absorption by about 20–30% when taken together.
Recommendation
Separate doses by at least 4 hours. Take levothyroxine on an empty stomach.
Evidence level
EstablishedStudies
Multiple controlled studies · FDA-labeled
When evidence is incomplete, we say so directly.
Beyond interactions
Interactions are just the start.
PharmaGuide checks the full picture: interactions, nutrient depletion, dose overlap, ingredient quality, personal fit, and recall alerts.
- 01
Medication depletion
Flags common medication-linked nutrient depletion patterns.
See how - 02
Stack intelligence
Checks supplement–supplement, supplement–drug, and drug–drug combinations, timing, and dose overlap.
See how - 03
Ingredient transparency
Shows active ingredients, excipients, blends, and label gaps.
See how - 04
Personal fit
Flags when a supplement or medication clashes with one of your conditions — across 14, including pregnancy, trying to conceive, diabetes, and upcoming surgery.
See how - 05
Nutrient accumulation
Catches when multiple products push the same nutrient too high.
See how - 06
Recall + safety alerts
Surfaces FDA recalls and banned or adulterant ingredients.
See how
Built for real life
The moments people don't realize
they need this.
From morning prescriptions to trending supplements, PharmaGuide catches the combinations people usually miss.
The prescription you've taken for years
Significant · Metformin → Vitamin B12
Pregnancy changes more than your routine
Contraindicated · Vitamin A over 10,000 IU
When your doctor adds something new
Contraindicated · St. John's Wort + Sertraline
Your gym stack, all together
Monitor · Turmeric + Ibuprofen
The supplements your parents take now
Caution · Ginkgo + Aspirin
Healthy can still overlap badly
Monitor · Multiple magnesium sources
The recall you'd never have heard about
Avoid · Undeclared sildenafil
Safe for most — not for your profile
Avoid · Potassium + kidney diseaseFrom the research desk
What the evidence actually says.
Plain-language guides to the research behind common supplement and medication questions — every claim cited, every article dated and signed.
- Deep Dive
October 15, 2026
Shilajit: what's actually in the bottle
Shilajit is a rock resin whose composition changes with the mountain it came from — and the chemistry literature still says it isn't known with certainty. Here's what metal testing actually found, what "4,000 mg" on a label means, and how to read a lab report.
19 min read - Education
May 15, 2026
GLP-1 nutrient gaps: supplement guide
GLP-1 medications like semaglutide and tirzepatide suppress appetite — which means less food and fewer nutrients. Here's what the research says about the gaps that develop, which supplements are worth discussing, and what to avoid.
15 min read - Deep Dive
May 9, 2026
Statins and CoQ10: what the research actually shows
Statins are associated with lower CoQ10 levels. Whether supplementation helps symptoms is more complicated than the wellness internet makes it out to be. Here's what the controlled trials, meta-analyses, and cardiology guidelines actually say.
16 min read
Join the founding testers.
We're adding founding testers by hand. Join the list for an invitation when a place is available. Your feedback will help us find what needs work.
Free during betaNo credit cardWe never sell your health data
Inside the beta
- 01
Scan & search
Scan a barcode or search for a supplement. Check that the product and label match what you have.
- 02
Verdicts with reasoning
Review product information and interaction warnings. Available details depend on the product and the evidence behind the result.
- 03
Personal Fit
Your profile and the details you enter help put results in context. Coverage varies, so bring questions to your pharmacist or clinician.
+ everything that ships at launch