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

Assertion : Cimetidine is an antacid.
Reason : Antacid increases secretion of HCI from gastric cells.

  1. If both assertion and reason are true and reason is the correct explanation of assertion.

  2. If both assertion and reason are true but reason is not the correct explanation of assertion.

  3. If assertion is true but reason is false.

  4. If both assertion and reason are false.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Climetidine is an antacid which suppress secretion of HCl.

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

Milk of magnesia is used as:

  1. antichlor

  2. antacid

  3. antiseptic

  4. food preservative
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Milk of magnesia consists of Magnesium hydroxide.

Antacid is a substance which neutralizes stomach acidity and used to relieve heatburn, indigestion. So, we use bases like Magnesium hydroxide or Sodium Carbonate.

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

Most commonly used antacids are:

  1. weak bases

  2. strong bases

  3. weak acids

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


Most commonly used antacids are weak bases.
Examples of antacid includes sodium bicarbonate, magnesium hydroxide, magnesium carbonate and aluminium hydroxide. An antacid is the substance which neutralizes the acid and raise the pH to an appropriate level in stomach. They should not be caustic like strong bases.

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

What is an antacid?

  1. The substance which neutralizes the acid and raises the pH to an appropriate level in stomach.

  2. The substance which neutralizes the acid and lowers the pH to an appropriate level in stomach.

  3. The substance which neutralizes the base and raises the pH to an appropriate level in stomach.

  4. none of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

An antacid is the substance which neutralizes the acid and raises the pH to an appropriate level in stomach. In other words, antacid is a base which neutralizes excess of acid in the stomach. Examples of antacid include sodium bicarbonate, magnesium hydroxide and aluminium hydroxide. They control the symptoms and not the cause.

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.