FoodData Central
fdc.nal.usda.gov
The USDA's laboratory-measured nutrient data for tens of thousands of foods
No sign-up
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drugs.com
Lists the interactions between the medicines, supplements and alcohol you enter.
Add each drug by name and it reports interactions graded major, moderate or minor, with a plain-English explanation of the mechanism and what to watch for, plus separate food, alcohol and disease sections. The content is maintained against licensed drug databases and reviewed by pharmacists, which is why it is one of the few consumer checkers clinicians will acknowledge. Brand names and availability follow US labelling.
Questions
Works the moment the page loads. No account, no email, no trial. It cannot see your dose, your kidney function or your other conditions, so it flags possibilities for a pharmacist or doctor to judge — never stop or change a medicine on its say-so.
Yes. Drugs.com Interaction Checker 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.
It cannot see your dose, your kidney function or your other conditions, so it flags possibilities for a pharmacist or doctor to judge — never stop or change a medicine on its say-so.
Alternatives
Same category or same task, ordered by how closely they overlap.
fdc.nal.usda.gov
The USDA's laboratory-measured nutrient data for tens of thousands of foods
medlineplus.gov
Plain-language health information from the US National Library of Medicine
exrx.net
An exercise library that names the muscles each movement actually works
kingarthurbaking.com
Gives the gram weight of a cup of every baking ingredient you are likely to use
metric-conversions.org
Converts between metric and imperial units and shows the working formula
omnicalculator.com
Around 3,000 small calculators, each with the formula shown underneath