
The information on a drug label, also called the product monologue, explains how to use the drug safely and where to report it. If the directions are followed, one will get the most out of the drug.
The U.S. Food and Drug Administration (FDA) strictly enforces drug labeling and instructs manufacturers on what information must appear on a label. This is to ensure that the product is stored and used safely.
Here is what is usually found on a label:
Classification
- The product and its use are described on the front and side panels of a drug container.
- There will be some indication of the product's classification next to the name.
- The Pr symbol indicates that the item is a prescription drug.
- No Pr denotes that no prescription is required to purchase it. This does not necessarily imply that it is available for purchase over the counter.
Drug identification number
- Before any drug can be legally sold, it must be assigned a Drug Identification Number (DIN).
- The FDA recommends manufacturers to provide data demonstrating product safety, effectiveness in meeting label claims, potency, and purity.
- When the manufacturer meets these requirements, the FDA assigns the drug a registration number.
- These measures assure that medicines have been thoroughly tested and are safe for the intended use when administered following label instructions.
Active ingredients
- The brand name of the product should be registered. The brand name is followed by the manufacturer's registered trademark symbol.
- The active ingredient and concentration or strength of the medicine are usually listed below the brand name.
- This component causes the medicine to have the desired effect as stated on the label, such as "recommended for the treatment of."
- The product is described in detail on the front panel.
Formulation
- The active ingredient is directly followed by the formulation of the drug.
- This indicates whether the product is an injectable, a powder, or a topical preparation.
- It gives the first hint as to how to administer the medication, but the dosage and administration section clarify it.
Dosages
- The volume of liquid or weight of nonliquid medicines is displayed on the front panel in milliliters or grams.
- This information is critical for calculating appropriate dosages. To ensure the efficacy of any drug product and avoid problems with residues or over-or under-dosing, dosages must be calculated correctly.
- On the label, manufacturers recommend safe and effective dosages. Using too little will yield poor results and using too much may result in residues of products.
- Either option reduces the cost-effectiveness of the product.
- Consider the following factors when calculating dosage:
- Weight
- Size of the dose
- How and where will the drug be administered
- How often will the dose be administered
- How long the treatment will last
Warnings
- The warning covers any precautions one should be aware of, such as the time at which the drug should be taken and the recommended time between doses.
- The warning statement includes any restrictions.
Other information
- The manufacturer's name and address provide a point of contact for additional product information.
- The label's side panel instructs on using this drug product, as well as how to store it to ensure that it remains effective in the future.
- There could be a warning label associated with storage and handling.
Lot numbers
- Manufacturers assign lot numbers to products, which can be used as a reference if adverse reactions occur.
- This number may be required in these cases for product investigations and recalls.
Expiry date
- A manufacturer-assigned expiry date indicates the date after which the drug should not be used. The FDA forbids retail outlets from selling expired medications.
Extra-label use
- In specific cases, the FDA approval process clears a drug for use. Any use of a drug in a special case that is not specified on the label is considered "extra-label" use and may result in unpredictable results.
- Extra-label medication use is generally discouraged. The proper dosages and withdrawal times are unknown, which may result in residues.
Prescription vs. over-the-counter drug label requirements
The regulations are different for prescription and over-the-counter drugs.
Here is an easy-to-understand walkthrough of the guidelines.
Labeling requirements for prescription drugs
On the primary product label:
- Statement of identity
- Brand name
- Net quantity of contents
- Statement of dosage
Prescription drugs must be accompanied by complete prescribing information, which includes instructions for safe use as well as scientific evidence of safety and efficacy. These specifics could be included in the package insert. They must not be deceptive and contain promotional language.
Here are some examples:
- Boxed warning
- Indications and usage
- Dosage and administration
- Dosage forms and strengths
- Contraindications
- Warnings and precautions
- Adverse reactions
- Drug interactions
- Use in a specific population (explains the drug’s applications in certain groups, such as children, pregnant women, and the elderly)
- Drug abuse and dependence
- Controlled substance
- Overdosage
- Description
- Ingredients
- Clinical pharmacology (explains specific technical information about the drug’s effects on the body)
- Nonclinical toxicology (summarizes the evidence regarding the drug’s potential to cause cancer, infertility, birth defects, and other serious side effects, which is found during experiments involving human and nonhuman tissue samples of dead persons)
- Clinical studies (summarizes the evidence supporting the drug’s safety and efficacy in humans)
- References (this section cites relevant literature that supports the drug’s effects)
- Storage and handling information
- Patient counseling information
Labeling requirements for over-the-counter medications
Over-the-counter (OTC) medications do not typically require a prescription, but they may be included in patients' charts for symptomatic treatment by healthcare providers. When taken in the recommended amounts, they have a low potential for abuse and are safe.
OTC drugs do not need package inserts if their labels are large enough to include all the necessary information.
The following details should be found on the principal display panels of OTC medicines:
- Statement of identity
- Brand name, which may include the company logo
- Net quantity of contents
- Statement of dosage
The following information must be written in the “Drug Facts” section:
- Active ingredient
- Purpose
- Uses
- Warnings
- Contraindications
- Other required warnings
- Directions for use
- Other pertinent information
- Inactive ingredients
- Questions or comments should be followed by the contact information and availability of people who can answer questions about the product, including its side effects. This section may include contact information for the manufacturer or distributor.
Package inserts for prescription drugs typically contain information about the drugs. Because there is so much information that patients and healthcare providers need to know about these products, they may use small fonts. However, because labeling these drugs requires less information, most OTC medications have all the drug facts written on their primary or secondary packaging.

QUESTION
About how much does an adult human brain weigh? See AnswerWhat is the role of government on drug labels?
The U.S. Food and Drug Administration (FDA) is the government agency in charge of setting dispensing guidelines, inspecting drugs, and conducting research for new drugs. Their approval determines whether a drug is available to consumers, and their recommendations cover most medications.
The Drug Enforcement Administration is the government agency in charge of enforcing the rules and guidelines that govern how prescription drugs are handled in the United States. This includes prescription guidelines and other dispensing issues, as well as standards for how drugs are monitored, inventoried, and moved.
The U.S. Drug Enforcement Administration (DEA) and FDA collaborate to develop and enact legislation on drug handling and, in this case, packaging and information. Certain information must be included on a prescription drug label.
The FDA requires prescription labeling to be printed with:
- Pharmacy information
- The doctor’s information
- Instructions
- Physical description of the drug
- Federal caution statement
- Dates
- Pharmacy prescription number
- Number of pills
- Number of times the drug can be reordered
The federal caution is a statement required by the DEA that is used to determine whether a drug is being used by the person for whom it was prescribed. The purpose of prescription drug warning labels is to deter abuse.
It is illegal to remove a warning label from a prescription drug package.
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What is the process to get a drug approved by the FDA?
The U.S. Food and Drug Administration (FDA) clearance process for a novel medicine might take anywhere from five to twenty years.
Preclinical research (animal studies) is the first step, followed by the submission of an investigational new drug (IND) application to commence clinical studies testing efficacy and safety in humans, and the submission of a new drug application to seek regulatory approval (NDA).
Preclinical testing
- The toxicity, pharmacokinetics, and metabolism of the chemical are investigated at this phase of the study.
- Drug qualities, such as chemical composition, stability, and solubility, are determined.
Investigational New Drug (IND) application
- Following the completion of the preclinical research, the company submits an Investigational New Drug (IND) application.
- The document covers not only all known information about the substance (drug production parameters, chemical makeup, and behavior) but also the proposed plan for human trials.
Clinical trials
There are four phases:
- Phase I: About 20 to 100 volunteers with the target illness condition are involved. This will take several months of specialized research to determine the safe and appropriate dosages of the new medicine. Approximately 70 percent of medications submitted for human trials will be approved.
- Phase II: A few dozen to as many as 300 persons are involved. The goal of this phase of clinical research is to determine the efficacy of the proposed treatment as well as to compile a list of side effects that may occur because of its administration. This phase can last anywhere from a few months to two years. Only 33 percent of drugs will pass.
- Phase III: A large-scale effort involving thousands of volunteers with the clinical condition that the drug is intended to treat. The goal here is to keep an eye on the drug's safety and efficacy.
- Phase IV: Phase IV clinical trials (post-marketing surveillance) include thousands of people. It is mainly done to find the adverse event profile of the drug.
New Drug Application (NDA) application
The FDA review teams submit evaluation reports along with recommendations to the FDA's administrative arm, which approves or rejects the NDA.
Drug labeling
The FDA will examine a potential new drug's labeling and packaging to ensure that appropriate and accurate information is communicated to both healthcare personnel and regular customers.
Facility inspection
- An FDA team inspects the manufacturing facilities at the site where the drug will be manufactured.
- This is a standard procedure in the drug approval process.
After fulfilling these steps, the FDA approves the drug.
National Institutes of Health. How are drugs approved for use in the United States? https://www.nichd.nih.gov/health/topics/pharma/conditioninfo/approval
Dabrowska A, Thaul S. How FDA Approves Drugs and Regulates Their Safety and Effectiveness. Congressional Research Service. https://fas.org/sgp/crs/misc/R41983.pdf
US Food and Drug Administration. Labeling Information | Drug Products. https://www.fda.gov/drugs/development-resources/labeling-information-drug-products
US Food and Drug Administration. Requirements on Content and Format of Labeling for Human Prescription Drug and Biological Products. https://www.federalregister.gov/documents/2006/01/24/06-545/requirements-on-content-and-format-of-labeling-for-human-prescription-drug-and-biological-products
Meek C. US Food and Drug Administration’s Requirements on Content and Format for Labeling for Human Prescription Drugs Rule (1979). The Embryo Project Encyclopedia. https://embryo.asu.edu/pages/us-food-and-drug-administrations-requirements-content-and-format-labeling-human-prescription
Science Direct. Drug Labeling. https://www.sciencedirect.com/topics/nursing-and-health-professions/drug-labeling
Drug Watch. How to Read a Drug Label. https://www.drugwatch.com/health/how-to-read-a-drug-label/
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