Drugs.com Interaction Checker
drugs.com
Lists the interactions between the medicines, supplements and alcohol you enter
No sign-up
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openfoodfacts.org
Scan a barcode and see the ingredients, additives and processing level.
A crowd-sourced database of packaged food from around the world, where each product carries its ingredient list, allergens, additives, Nutri-Score and NOVA processing classification, all under an open licence. It is the only free source that covers non-US supermarket products at scale, and anyone can photograph and add a missing item. The trade-off is inherent: entries are only as accurate as the last contributor.
Questions
Works the moment the page loads. No account, no email, no trial. Data is contributed by volunteers, so a product can be missing, out of date or transcribed wrongly from the label.
Yes. Open Food Facts sends your input to its own servers to process it. That is fine for public material; for anything containing personal data, use one of the on-device tools instead.
Data is contributed by volunteers, so a product can be missing, out of date or transcribed wrongly from the label.
Alternatives
Same category or same task, ordered by how closely they overlap.
drugs.com
Lists the interactions between the medicines, supplements and alcohol you enter
exrx.net
An exercise library that names the muscles each movement actually works
fdc.nal.usda.gov
The USDA's laboratory-measured nutrient data for tens of thousands of foods
kingarthurbaking.com
Gives the gram weight of a cup of every baking ingredient you are likely to use
medlineplus.gov
Plain-language health information from the US National Library of Medicine
metric-conversions.org
Converts between metric and imperial units and shows the working formula