How to Read Prescription Drug Information

Start by confirming the product

Check the product name, active ingredient, strength, dosage form, and the person for whom it was prescribed. Similar brand and generic names can refer to the same active ingredient, while similar-looking packaging can contain different strengths.

If any detail conflicts with the prescription or the instructions you received, contact the dispensing pharmacy before using the medicine.

Understand the main information layers

FDA explains that human prescription drug labeling includes prescribing information, patient labeling when required, and carton or container labeling. Patient materials can include a Medication Guide, Patient Package Insert, or Instructions for Use.

FDA describes this labeling as containing a summary of the essential scientific information needed for the safe and effective use of the drug. Do not use a general web summary as a substitute for the material supplied with your exact product.

Use an official lookup source

FDA's Drugs@FDA tools let users search approved brand-name and generic drugs by name, active ingredient, or application number. The record can help confirm approval status and locate labeling for an approved product.

A compounded preparation will not have its own FDA-approved product label. Ask the prescriber or dispensing pharmacy for product-specific directions and warnings.

Questions for the clinician or pharmacist

• What is the active ingredient and strength?
• Which warnings or interactions are most relevant to my medication list?
• Is there a Medication Guide or Instructions for Use for this product?
• Who should I contact if the label or directions are unclear?