What are examples of H2-receptor antagonists?

H2 blockers are a group of medicines that reduce the amount of acid produced by the cells in the lining of the stomach. They are also called ‘histamine H2-receptor antagonists’ but are commonly called H2 blockers. They include cimetidine, famotidine, nizatidine and ranitidine, and have various different brand names.

What are the four main H2 antagonists in current?

The four H2 blockers in current use are available by prescription as well as over-the-counter, and are some of the most widely used drugs in medicine….

• Cimetidine.
• Famotidine.
• Nizatidine.
• Ranitidine.

Which H2 blocker is best?

Famotidine is the most potent, selective H2-receptor antagonist yet available for ulcer therapy. On a weight basis, famotidine is approximately eight times more potent than ranitidine and 40 times more potent than cimetidine.

Which H2 blocker is best for GERD?

Cimetidine is the H2 blocker that was the first introduced to clinical practice. Cimetidine is available by prescription and over-the-counter under differing generic and brand names such as Tagamet or Tagamet HB, as well as intravenous and intramuscular forms.

Is Zantac a H2 blocker?

Zantac (ranitidine) belongs to a class of acid-blocking drugs called H2 blockers. The active ingredient, ranitidine, works by blocking a chemical called histamine. This reduces the amount of acid in the stomach. The drug starts to work in as little as 30 minutes.

Is Pepcid an H1 or H2 blocker?

Famotidine (Pepcid) Famotidine is an H2 antagonist that, when combined with an H1 type, may be useful in treating allergic reactions that do not respond to H1 antagonists alone.

Is Allegra an H2 blocker?

Fexofenadine, sold under the brand name Allegra among others, is an antihistamine pharmaceutical drug used in the treatment of allergy symptoms, such as hay fever and urticaria. Therapeutically, fexofenadine is a selective peripheral H1 blocker.

Is Zantac an H2-receptor antagonist?

There are four H2 blockers available by prescription: cimetidine (Tagamet) ranitidine (Zantac)** nizatidine (Axid)

Is omeprazole a H2 blocker?

Are famotidine and omeprazole the same? Famotidine and omeprazole are not the same. Although they treat similar gastrointestinal problems, they are different drugs. Famotidine is an H2 blocker and omeprazole is a PPI.

Is Zyrtec H1 or H2?

Note: The H1 and H2 antihistamines are necessary to stabilize receptors on the mast cell….Medications to Treat Mast Cell Diseases.

Is Nexium a H2 blocker?

Drugs that do the latter are called proton pump inhibitors (PPI’s). Examples include esomeprazole (Nexium) and lansoprazole (Prevacid). Drugs that do the former are called H2 blockers, and examples include cimetidine (Tagamet), ranitidine (Zantac), and famotidine (Pepcid).

Is Allegra H1 or H2?

The second generation H1-antihistamines such as fexofenadine (Allegra), loratidine (Claritin), cetirizine (Zyrtec) have less of a sedating effect. Few of the main side effects from antihistamines include: Dry mouth. Dry nasal mucosa.