NIH site: "DailyMed provides high quality information about marketed drugs. Drug labeling on this Web site is the most recent submitted to the Food and Drug Administration (FDA) and currently in use; it may include, for example, strengthened warnings undergoing FDA review or minor editorial changes."
Includes tabs for indications, usage, contraindications, adverse reactions, dosage, patient counseling, etc. from FDA package inserts- Search by generic or brand name

From the Food and Drug Administration, includes approval history, medication guide, therapeutic equivalents

Includes medication safety alerts, high alert medication lists, do not use abbreviations list

Provides authoritative information about diseases, conditions, and wellness issues for patients, family members, and friends.

Includes drug category descriptions

Registration required for full monograph) includes both prescription and some non - prescription drugs

Drug calculations and practice tests

Contains information on drugs and other chemicals to which breastfeeding mothers may be exposed. It includes information on the levels of such substances in breast milk and infant blood, and the possible adverse effects in the nursing infant.