Trusted sources
Official references
Use primary sources and licensed clinicians for medication decisions — not blog calculators.
This blog shares general health education from a registered nurse. It is not medical advice, diagnosis, or treatment. Always speak with your own healthcare provider about your personal situation.
DailyMed (U.S. drug labels)
Official FDA labeling for many U.S. prescription and OTC products.
FDA Drugs
Drug safety communications, approvals, and consumer resources.
MedlinePlus
Plain-language health topics from the U.S. National Library of Medicine.
CDC
Public health guidance, prevention topics, and vaccine information.
Find a pharmacist / local pharmacy
When in doubt about a medicine you already take, ask a pharmacist or your clinician directly.