Test: Therapeutic Action of different Classes of Drugs (Old NCERT) - NEET MCQ

Antihistamines are vascodialators and antiallergics.

Tranquilizers is a neurologically active drug. This affects the message transfer mechanism from nerve to receptor. Tranquilizers are a class of chemical compounds used for the treatment of stress, and mild or even severe mental diseases. These relieve anxiety, stress, irritability or excitement by inducing a sense of well-being. They form an essential component of sleeping pills.

Analgin is an antipyretic 

Noradrenaline is a neurotransmitter that plays a role in mood swings. Low levels of noradrenaline lower the signal-sending activity and make the person suffers from depression.

Salvarsan is an Antibiotic.

The drugs which act on the central nervous system (CNS) and help in reducing stress and fatigue by inducing a sense of well being are called tranquilizers. They are psychotherapeutic drugs. The most commonly used tranquilizers are barbituric acid and its 5,5-disubstituted derivatives such as veronal, luminal and seconal.

2-Acetoxybenzoic acid, commonly known as 'aspirin' acts as an analgesic.

Except aspirin, all other drugs are habit forming.

Antipyretics lower the body temperature in fever.

Morphine narcotics are sometimes referred to as opiates, since they are obtained from the opium poppy

Antimicrobials destroy or prevent the pathogenic action of microorganisms. Antibiotics, antiseptics and disinfectants are antimicrobial drugs.

Prontosil is an antibacterial agent containing sulphur.

Dysidazirine is supposed to be toxic against certain strains of cancer cells.

Oxytocin is a hormone, which is released from posterior pituitary gland. It controls the contraction of uterus after child birth and releases milk from the mammary glands.

Chloroquine is an effective antimalarial drug.

Methyl salicylate is commonly known as 'aspirin' and used as an analgesic.

Penicillin is a bactericidal antibiotic.

Penicillin has bactericidal effect.

Norethindrone is an antifertility drug.

Disinfectants are harmful to the living tissues hence they are not applied to the skin.

Ampicillin is synthetic modification of penicillin.

2-3% solution of iodine in alcohol-water mixture is known as tincture of iodine. It is a powerful antiseptic.

Antiseptics are applied to the living tissues such as wounds, cuts, ulcers and diseased skin surfaces. Examples are furacine, soframicine etc. These are not ingested like antibiotics. Commonly used antiseptic, dettol is a mixture of chloroxylenol and terpineol.

Estrogen and progesterone are hormones.

Antibiotics have either cidal (killing) effect or a static (inhibitory) effect on microbes.
Bactericidal antibiotics kill bacteria whereas bacteriostatic antibiotics slow their growth or reproduction.
The range of bacteria or other microorganisms that are affected by a certain antibiotic is expressed as its spectrum of action.
Those effective mainly against Gram-positive or Gram-negative bacteria are narrow spectrum antibiotics. 
Receptors are proteins that are crucial to body’s communication process.
Here, option B matches the appropriate answers and hence is the correct option.