Drugs are chemical substances which by interacting with the biological systems produce some changes in them. There are a variety of drugs available for use in the diagnosis, cure, treatment, or prevention of disease. These drugs fall into two broad categories:
a. prescription drugs and
b. over-the-counter (OTC) drugs
Prescription (prescription medications or legend drugs) are drugs that are accessible only by prescription from a licensed practitioner. Although these drugs have been tested for safety and therapeutic effect, they may cause different reactions in some individuals.
Drugs that fall under this classification are:
i. Those given by injection
ii. Hypnotic or soporific drugs (commonly known as sleeping pills)
iii. Narcotics (drugs that have analgesic and sedative effect)
iv. Habit-forming drugs
v. Drugs that are unsafe unless administered under the supervision of a licensed practitioner
vi. New drugs that are still being investigated and not considered safe for indiscriminate use by the public
Read Also: Understanding Pharmaceutical Dosage Forms
Over-the-counter drugs are called non-prescription drugs and are available to the public without a prescription. Most of them are for self-limiting conditions and appropriate labels for use are usually provided. Some over-the-counter drugs were at one time available by prescription but later were considered safe for use by the public or reformulated for over-the-counter use. Some drugs can be sold in lower doses over-the-counter while higher doses of the same drug require a prescription as per Food and Drug Administration (FDA) requirements.
Some examples of over-the-counter drugs include:
i. Pain relievers like acetaminophen (Tylenol) and nonsteroidal anti-inflammatory drugs (NSAIDs) e.g., ibuprofen, aspirin, etc.
ii. Cough medications like dextromethorphan (Triaminic Cold and Cough, Vicks 44 Cough and Cold, etc), guaifenesin (Mucinex, Robitussin Chest Congestion)
iii. Antihistamines like Chlorphenamine (Piriton), loratadine (Claritin 24H), cetirizine (Zyrtec), etc.
iv. Decongestants e.g., pseudoephedrine (Sudafed), Oxymetazoline (Afrin), etc.
Here are the key differences between and prescription drugs and OTC drugs.
|Prescription drugs||Over-the-Counter drugs|
|Prescribed by a licensed practitioner||Does NOT require a prescription from a licensed practitioner to be dispensed.|
|Bought at a pharmacy||Bought off-the-shelf in at drug stores or groceries|
|Prescribed for and intended to be used by one person||Considered safe for just about everyone and may have a variety of intended purposes|
|Regulated by FDA through the New Drug Application (NDA) process||Regulated by FDA through OTC Drug monographs|
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