Chemistry · Biology

Pharmacology and Therapeutics

1,643 Questions

Engage with critical pharmacology and therapeutics questions covering drug classifications and therapeutic mechanisms. Topics include chemical absorption, medication formulations, and pharmacogenomics. This collection is useful for students preparing for medical entrance, nursing, and science competitive examinations.

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Pharmacology and Therapeutics Questions

Multiple choice chemistry medicinal chemistry antacids and antihistamines therapeutic action of different classes of drugs ph regulation of the stomach

Antacids are ______.

  1. drugs or other compounds that inhibits the physiological effects of histamine, used especially in the treatment of allergies.

  2. (of a drug) used to relieve pain.

  3. medicinal drugs taken to reduce tension or anxiety.

  4. (chiefly of a medicine) used to prevent or correct acidity, especially in the stomach.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Antacid are drugs or medicines used to prevent or correct acidity, especially in the stomach.
Examples are Cimetidine, Ranitidine, etc.

Multiple choice chemistry medicinal chemistry antacids and antihistamines therapeutic action of different classes of drugs ph regulation of the stomach

_______ is a substance which neutralizes stomach acidity, which in turn relieves heartburn, indigestion or stomach upset.

  1. Antibiotic

  2. Antacid

  3. Disinfectant

  4. Anti-fertility drug
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

An antacid (derived from the word "anti-acid") is a substance which neutralizes stomach acidity, which in turn relieves heartburn, indigestion or stomach upset.
Histamine and cimetidine are examples of antacids.

Multiple choice chemistry medicinal chemistry antacids and antihistamines therapeutic action of different classes of drugs ph regulation of the stomach

Which of the following cannot be used as an antacid?

  1. Rantidine

  2. Cimetidine

  3. Metal hydroxides

  4. None of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Antacid is a drug (or medicine) preventing or correcting acidity, especially in the stomach.
To neutralize the acid in stomach, antacid should be basic in nature.
All three can be used as antacids since they are basic in nature.

Multiple choice chemistry medicinal chemistry antacids and antihistamines therapeutic action of different classes of drugs ph regulation of the stomach

The drug cimetidine was designed to:

  1. prevent the interaction of histamine with receptors

  2. stimulates the secretion of pepsin

  3. reduce gaestro intestinal juices

  4. all of the above
Reveal answer Fill a bubble to check yourself
A,C Correct answer
Explanation

The drug cimetidine (Tegamet), was designed to prevent the interaction of histamine with the receptors present in the stomach wall. This resulted in release of lesser amount of acid. The importance of the drug was so much that it remained the largest selling drug in the world until another drug, ranitidine (Zantac), was discovered.

Multiple choice chemistry medicinal chemistry antacids and antihistamines therapeutic action of different classes of drugs ph regulation of the stomach

Which of the following is an antihistamine?

  1. Brompheniramine

  2. Equanil

  3. Ranitidine

  4. Cimetidine
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Antihistamine is a drug that inhibits the physiological effects of histamine, used especially in the treatment of allergies.


Brompheniramine is an antihistamine.

Equanil is a tranquilizer.

Ranitidine and Cimetidine are antacids.

Hence the correct option is A.

Multiple choice chemistry medicinal chemistry antacids and antihistamines therapeutic action of different classes of drugs ph regulation of the stomach

Which of the following is an antihistamine?

  1. Brompheniramine

  2. Rantidine

  3. Cimetidine

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Antihistamine is a drug or other compound that inhibits the physiological effects of histamine, used especially in the treatment of allergies.
Brompheniramine is an antihistamine drug.
Rantidine and Cimetidine are antacids.

Multiple choice chemistry medicinal chemistry antacids and antihistamines therapeutic action of different classes of drugs ph regulation of the stomach

Equanil is a/an:

  1. tranqulizer

  2. antifertility drug

  3. artificial sweetner

  4. antihistaamine
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Equanil is a tranquilizer.
This medication is used short-term to treat symptoms of anxiety and nervousness. It acts on certain centers of the brain to help calm your nervous system which is same as tranquilizer which also have  a calming effect and eliminate both the physical and psychological effects on anxiety or fear.

Multiple choice chemistry medicinal chemistry antacids and antihistamines therapeutic action of different classes of drugs ph regulation of the stomach

The compound that causes general depressant action on the central nervous system belongs to the class of:

  1. tranquilizers

  2. analgesics

  3. antihistamines

  4. narcotic analgesics
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Tranquilizer, a drug that is used to reduce anxiety, fear, tension, agitation, and related state of mental disturbance. 

Tranquilizers act on central nervous system and thus causes depression of central nervous system.

Multiple choice chemistry medicinal chemistry antacids and antihistamines therapeutic action of different classes of drugs ph regulation of the stomach

Which one of the following drugs prevents the interaction of histamine with its receptor?

  1. Antihistamines

  2. Analgesics

  3. Antibiotics

  4. Disinfectants
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Antihistamines are drugs which treat allergic rhinitis and other allergies. Antihistamines can give relief when a person has nasal congestion, sneezing, or hives because of pollen, dust mites, or animal allergy. Typically people take antihistamines as an inexpensive, generic, over-the-counter drug with few side effects. As an alternative to taking an antihistamine, people who suffer from allergies can instead avoid the substance which irritates them. However, this is not always possible as some substances, such pollen, are carried in the air, thus making allergic reaction caused by them generally unavoidable.