LabelRx: FDA Drug Reference

LabelRx is a clinical drug reference for licensed healthcare professionals — pharmacists, physicians, advanced-practice nurses, residents, and pharmacy/medical students. Free, no ads, no account required.

Every FDA prescription drug, every label, every Boxed Warning — searchable in seconds and sourced straight from the authoritative public registries the FDA publishes.

— Data sources —

• DailyMed (NIH / National Library of Medicine) — the full FDA-approved Structured Product Labeling (SPL) for every U.S. prescription drug
• Drugs@FDA — approval history, NDA / ANDA / BLA numbers, sponsors, application letters
• FDA Orange Book — therapeutic-equivalence (AB) codes for legal generic substitution, plus active patents and exclusivities
• FDA Drug Shortages database — current shortages with reason, discontinuation, and resolution dates
• FDA MedWatch — Class I / II / III recalls, enforcement reports, and safety alerts
• ClinicalTrials.gov — every registered clinical trial on the approved drug
• openFDA FAERS — aggregated post-market adverse event signal by MedDRA term
• RxNorm — normalization across brand, generic, and ingredient names
• CPIC — Clinical Pharmacogenetics Implementation Consortium gene-drug guidelines

— What you get on every drug —

• Boxed Warnings front and center, never buried
• Dosing organized by indication, with renal and hepatic adjustments surfaced
• Contraindications, warnings, and adverse reactions in clinical reading order
• Pregnancy and lactation rendered per the FDA PLLR
• Orange Book AB codes and therapeutic equivalents for generic substitution
• Active patents and exclusivities so you see when generics are likely
• Active FDA recalls flagged at the top of the drug
• REMS programs surfaced as advisories
• Controlled-substance schedule (CI–CV) badge
• Pharmacokinetics: half-life, protein binding, dialyzability, CYP substrate / inhibitor / inducer
• Pharmacogenomics: CPIC Level A gene-drug guidelines (CYP2C19, CYP2D6, TPMT, UGT1A1, HLA-B, DPYD, SLCO1B1, and more)
• Post-market FAERS adverse event signal aggregated by MedDRA term
• Clinical trial activity from ClinicalTrials.gov

— Clinical calculators —

90+ calculators across nephrology, hepatology, cardiology, ID, psychiatry, oncology, hematology, obstetrics, geriatrics, critical care, and general medicine. Every formula cites primary sources (KDIGO, CKD-EPI 2021, Cockcroft-Gault, MELD 3.0, CHA₂DS₂-VASc, HAS-BLED, Wells, PERC, GRACE, TIMI, Alvarado, Glasgow-Blatchford, Child-Pugh, APACHE II, SOFA, qSOFA, CIWA-Ar, COWS, PHQ-9, GAD-7, AUDIT, EPDS, Bishop, Parkland, ASCVD, Beers Criteria, Schwartz pediatric GFR, Holliday-Segar fluids, Vancomycin AUC/MIC, Opioid MME per CDC 2022, and many more).

Every calculator shows its formula, citation, and a clinical-use disclaimer.

— Tools —

• Renal Dose Adjustment lookup against the actual FDA label text
• Substitution Finder using real Orange Book TE codes
• Pregnancy & Lactation reference
• Drug Shortage tracker (live FDA + ASHP feed)
• Pill Identifier by imprint, color, and shape
• Label Co-Mentions (label-text search, NOT a validated DDI database)

— News & alerts —

• FDA new approvals feed, straight from Drugs@FDA
• Push notifications for label changes and shortages on drugs you save
• Daily clinical assessment to keep your knowledge sharp

— Disclaimer —

LabelRx is a reference. It is not FDA-cleared as a medical device or as clinical decision support software. Always verify with the current FDA-approved prescribing information, your institutional protocols, and your own clinical judgment. Not a substitute for the full prescribing information or a licensed clinician.