Lexicomp provides adult and pediatric drug information in addition to interaction analysis, drug identification tools, medical calculators, and patient education materials.
The Medical Letter On Drugs and Therapeutics is an independent, peer-reviewed, nonprofit publication that offers searchable, unbiased critical evaluations of drugs, with special emphasis on new drugs.
LactMed contains information on drugs and breastfeeding. It includes information on the levels and adverse effects in the nursing infant, as well as suggested therapeutic alternatives.
Psychological tests, measures, scales, surveys, and other assessments as well as descriptive information about the test and its development and administration
UpToDate includes calculators that allow you to enter the values in commonly used formulas to obtain numerical data or estimate the severity of a condition.