Class 12 · Human Health and Diseases

Drug Abuse and Misuse — NEET Biology

📚 Practice Concept
📖 NCERT Source

Drugs like barbiturates, amphetamines, benzodiazepines, and other similar drugs, that are normally used as medicines to help patients cope with mental illnesses like depression and insomnia, are often abused. Morphine is a very effective sedative and painkiller, and is very useful in patients who have undergone surgery. Several plants, fruits and seeds having hallucinogenic properties have been used for hundreds of years in folk-medicine, religious ceremonies and rituals all over the globe. When these are taken for a purpose other than medicinal use or in amounts/frequency that impairs one's physical, physiological or psychological functions, it constitutes drug abuse.

NCERT Biology · Class 12 · Chapter 7 · Paragraph 69
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Assertion (A): The same substance can be medicine or constitute drug abuse depending on usage. Reason (R): Morphine is always harmful regardless of medical supervision and dosage.

📖 Solution & NCERT Explanation
View solution & NCERT explanation

Correct answer: C If assertion is true but reason is false.

NCERT explains that substances like morphine have legitimate medical uses but “When these are taken for a purpose other than medicinal use or in amounts/frequency that impairs one’s physical, physiological or psychological functions, it constitutes drug abuse” making Assertion true. However, NCERT states “Morphine is a very effective sedative and painkiller, and is very useful in patients who have undergone surgery” contradicting the Reason.

❓ Frequently Asked Questions
What does NCERT say about Drugs like barbiturates amphetamines?
Drugs like barbiturates, amphetamines, benzodiazepines, and other similar drugs, that are normally used as medicines to help patients cope with mental illnesses like depression and insomnia, are often abused. Morphine is a very effective sedative and painkiller, and is very useful in patients who have undergone surgery.
Has this concept appeared in NEET?
Practice this NCERT concept with questions on MedicNEET.
Which chapter is this from?
Human Health and Diseases, Class 12 NCERT Biology.

Through deep analysis of NEET and NTA, 176 of the 180 ReNEET 2026 (June 21) questions were already in the MedicNEET question bank before the exam.

176/180
of the ReNEET 2026 paper (all subjects) was already in the MedicNEET question bank

MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.

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