Exam 2 Study Guide Flashcards
What are the general Principles of Virology?
a. A virus cannot replicate on its own. It must attach to and enter a host cell.
b. A virus then uses the host cell’s energy to synthesize protein, DNA and RNA.
c. Viruses are difficult to kill because they live inside cells. (Any drug that kills a virus also kills healthy cells)
What is the purpose and use of antiviral drugs?
Kill or suppresses the virus by destroying virions or inhibiting the ability of viruses to replicate; controlled by current antiviral therapy.
What drugs are used to treat influenza?
Amantadine and Rimantadine
Oseltamivir
Amantadine and Rimantadine
Only active against influenza A viruses
Oseltamivir
- Active against influenza A and B.
- Will reduce duration of illness.
- Treatment should begin within two days of influenza onset.
Oseltamivir: Adverse Effects
Nausea and Vomiting
Herpes Zoster (Shingles)
Painful (opioids for pain control)
Follow nerve tracts (dermatitis): usually unilateral
Postherpetic neuralgias
What is used to treat Herpes Zoster (Shingles)?
Acyclovir
Acyclovir
Drug that speeds the recovery of shingles.
Used to suppress replication of HSV-1, HSV-2, and HSV-3.
Best results of acyclovir are seen when?
When the antiviral drug is started within 72 hours of symptom onset.
What are the adverse effects of acyclovir?
Nausea
Diarrhea
Headache
Burning when topically applied
HIV
Retrovirus (uses RNA as its genetic material)
Transmitted by sexual activity, intravenous drug use, perinatally from mother to child
What drugs are used to treat HIV?
Zidovudine
Nevirapine
Both are well tolerated.
What are the adverse effects of zidovudine?
BONE MARROW DEPRESSION
Nephrotoxicity
Hepatotoxicity
Decreased WBC
What are the adverse effects of nevirapine?
Well tolerated. Rash Fever Nausea Headache Abnormal liver function test results
What is the purpose and use of immunosuppressants?
a. Drugs that decrease or prevent immune response, thus suppressing the immune system.
b. Used to prevent or treat rejection of implanted organs or autoimmune disorders.
What are the nursing implications for immunosuppressants?
- Patients taking immunosuppressants should be encouraged to take measures to reduce the risk of infection (i.e Avoid crowds and avoid people with colds or other infections)
- Inform patients to immediately report fever, sore throat, chills, joint pain, fatigue, or other signs of a severe infection.
- Interacts with grapefruit/grapefruit juice
What is an organ transplant?
Transplanted organs have antigens that trigger an immune response -> rejection.
What is azathioprine used for?
Prevents rejection of kidney transplants.
What are the adverse effects of azathioprine?
a. BONE MARROW SUPPRESSION
b. Development of lymphoma and other malignancies
c. Hepatosplenic T-cell lymphoma
What is SLE?
Multisystem autoimmune inflammatory disease.
What is the Pathophysiology of SLE?
Antibodies react with circulating antigen (nucleic acids, erythrocytes, phospholipids, lymphocytes, platelets, etc.) Reaction forms circulating immune complexes.
What are the clinical manifestations of SLE?
a. Photosensitivity, scaly erythmatous: Butterfly skin rash
b. Plaques with follicular plugging
c. Scarring
d. Nonerosive arthritis
e. Pancreatitis
f. Vasculitis
g. Anemia
h. GN
i. Pleural effusion
j. Endocarditis
k. Thrombosis of intracranial vessels
What are the treatment options for SLE?
a. Hydroxychloroquine
b. Glucocorticoids
c. NSAIDs
d. Immunosuppressive Agents
e. Chronic Support – education, counseling, eat well, exercise