Fitz, Influenza Virus Flashcards Preview

MED234 Respiratory > Fitz, Influenza Virus > Flashcards

Flashcards in Fitz, Influenza Virus Deck (19):
1

Name the two neuraminidase inhibitors and what influenza virus type(s) do they affect?

-Zanamivir
-Oseltamivir

They affect Influenza A and B

2

Name the two drugs that block viral M2 ion channels and what influenza virus type(s) do they affect?

Adamantanes:
-Amantadine
-Rimantadine

They affect Influenza A

3

What drug is used for RSV?

Ribavirin

4

MOA of neuraminidase inhibitors.

Influenza virus binds to sialic acid and the neuraminidase inhibitor STOPS the viral neuraminidase from cleaving the acid from the host lung epithelium.

5

What is sialic acid?

Glycoprotein in lung epithelium

6

Osaltamivir administration route and age.

Route - oral
Kids, 1+yo for Treatment and Prevention

7

A child who comes in with NAUSEA is taking what neuraminidase inhibitor?

Osaltamivir

8

Zanamivir administration route and age.

Route - inhaled
Kids, 7+yo for treatment, 5+yo for prevention

9

Zanamivir is NOT recommended for people with what three conditions?

1. asthma
2. COPD
3. respiratory disease

10

Administer neuraminidase inhibitor within what time frame of symptoms appearing to achieve reduction in what 4 things?

Reduction of:
1. Duration of symptoms decreased 1-2 days
2. Anti-pyretic use
3. Viral shedding
4. Complications

11

Name the groups with the highest burden of influenza?

-Elderly
-COPD
-Asthma
-CHF
-DM
-Pregnant women
-Young children

12

MOA of adamantanes (2)

1. Block M2 (H+) channel to stop the acidification that enables viral replication inside the endosome.
2. Also blocks maturation of InfluenzaHA glycoprotein (results in progeny that are poorly infective)

13

Amantadine - CNS penetration? Elimination route?

Yes, CNS.
Elimination - renal

14

Ramantadine - CNS penetration? Elimination route?

No CNS.
Elimination - mixed renal/hepatic.

15

Begin adamantane administration within how many hours of symptom onset.

Within 48 hours

16

Amantadine and rimantadine are not recommended for what?

Antiviral treatment or chemoprophylaxis of CIRCULATING/NON-ACTIVE influenza A strains.

17

MOA of Ribavirin

inhibits viral mRNA synthesis

18

When is Ribavirin used?

In severe RSV in immunosuppressed pts. Avoid routine use.

19

Add what to Ribavirin to relieve lower airway obstruction?

B-ag (albuterol)