Problem 18 - A Complete Resource Book in Chemistry for JEE Main

Question

Barbituric acid is used as (a) a tranquilizer (b) an antibiotic (c) an antipyretic (d) an antiseptic

Step-by-Step Solution

Answer

Barbituric acid is used as a tranquilizer (option a).

Step 1: Understanding the Question

The question asks us to identify the primary use of barbituric acid from a given list of options. These options include tranquilizer, antibiotic, antipyretic, and antiseptic.

Step 2: Identify Barbituric Acid's Function

Barbituric acid is the precursor compound and derivative for barbiturates, which are central nervous system depressants. They are primarily used for sedation and anxiolytic (calming) purposes, aligning with the characteristics of a tranquilizer.

Step 3: Match to Choices

Based on our understanding that barbituric acid derivatives are used primarily for tranquility and sedation, it matches with the function of a tranquilizer listed in the options.

Key Concepts

Tranquilizers

Tranquilizers are a type of medication that help calm the central nervous system without inducing sleep. They are used to reduce anxiety and tension in individuals, creating a calming effect. Tranquilizers are commonly prescribed for people experiencing anxiety disorders, insomnia, or muscle spasms.

There are two primary types of tranquilizers: major and minor. Major tranquilizers, also known as antipsychotics, are usually prescribed for serious mental health conditions like schizophrenia. On the other hand, minor tranquilizers, sometimes referred to as anxiolytics, are used to address everyday stress and anxiety. Barbiturates were once popular minor tranquilizers due to their calming effects.

However, it’s essential to use them with caution as they can be habit-forming. Understanding the correct use improves safety and effectiveness in calming the nervous system.

Central Nervous System Depressants

The central nervous system (CNS) depressants are substances that slow down brain activity, which can help relax the muscles and calm the nerves. Because of this, they are often used to treat anxiety, panic, sleep disorders, stress, and other mental health issues.

Examples of CNS depressants include barbiturates, benzodiazepines, and alcohol. These depressants work by enhancing the effect of a neurotransmitter called gamma-aminobutyric acid (GABA). This leads to sedation, relaxation, and drowsiness, making them effective as tranquilizers.

• They can help treat insomnia and anxiety.
• They are prescribed as muscle relaxants and anticonvulsants.

The primary concern with CNS depressants is the risk of dependency and overdose. Over time, the body can become tolerant, requiring higher doses to achieve the same effect, which increases the potential for misuse.

Barbiturates

Barbiturates are a class of drugs that originate from barbituric acid. They act as central nervous system depressants, which means they have a calming effect on the body, and help reduce anxiety and induce sleep. Barbiturates were once widely prescribed for anxiety, insomnia, and seizure disorders.

Today, they have largely been replaced by benzodiazepines as they are considered safer. However, barbiturates are still used in certain surgical procedures and in treating specific seizure disorders. This is because, despite the risks, they are effective in controlling severe conditions.

Barbiturates should be used under strict medical supervision due to their potential for addiction and overdose. Overuse can lead to breathing difficulties, coma, or even death. Barbiturates highlight the importance of understanding drug interactions, the risk of dependency, and patient history in clinical settings.