Hepatitis and Liver Disease Flashcards
Hepatitis A transmission
fecal-oral route
Treatment of Hepatitis A
supportive
Treatment of Hepatitis B
interferons, select NRTIs
most common indication for liver transplant
hepatitis C
of hepatitis C genotypes
6
treatment options for hepatitis C
peginterferons, ribaviron, direct acting antivirals (protease inhibitors, NS5B polymerase inhibitors, NS5A replication complex inhibitors)
Interferon alfa indicated for treatment of which hepatitis
HBV and HCV
Interferon alfa 2b brand name
intron A
interferon alfa 2b indications
hbc, hcv, many cancers
Pegylated interferon alfa 2a brand name
pegasys
pegylated interferon alfa 2a indications
HBV, HCV
Pegylated interferon alfa 2b brand name
peg-intron
pegylated interferon alfa 2b indications
HCV
Which dose reductions are required when treating with interferon alfa
thrombocytopenia, neutropenia, renal dysfunction
When in neutropenia should be interferon alfa be held
ANC
when in thrombocytopenia should interferon alfa be held
platelets
boxed warnings for interferon alfa
cause or exacerbate neuropsychiatric, autoimmune, ischemic, or infectious disorders. combination with ribavirin can cause birth defects, fetal mortality, or hemolytic anemia
contraindications to interferon alfa
autoimmune hepatitis, decompensated liver disease in cirrhotic patients, infant and neonates (Pegasys)
warning for interferon alfa
neuropsychiatric events, cardiovascular events, endocrine disorders (aggravates hypo/hyperthroidism, hypo/hyperglycemia), ophthalmologic disorders (retiniopathy, decrease in vision), pancreatitis, myelosuppression and serious skin reactions
interferon alfa side effects
CNS effects (fatigue, anxiety, depression, weakness), GI upset (N/V, anorexia, weight loss), increased LFTs (5-10x ULN), myelosuppression, mild alopecia, Flu-like syndrome (fever, chills, HA, malaise, arthralgia, myalgia, diaphoresis)
pretreatment required for interferon alfa
acetaminophen and antihistamine
Interferon alfa monitoring
CBC with differential and platelets, LFTs, urice acid, SCr, electrolytes, TGs, thyroid function tests, serum HBV DNA or HCV RNA levels
NRTIs MOA
inhibit HBV replication by inhibiting HBV polymerase resulting in DNA chain termination
Dose adjustment required for all NRTIs (HBV)
CrCl
Boxed warnings for ALL NRTIs (HBV)
Lactic acidosis and severe hepatomegaly with steatosis (may be fatal). Exacerbations of HBV upon discontinuation,
Lamuvidine brand name (HBV)
Epivir HBV
Lamuvidine dose for HBV only
100 mg daily
Lamuvidine dose for HBV with HIV coinfection
150 mg BID or 300 mg daily
Lamuvidine dose adjustment
decrease dose CrCL
Lamuvidine boxed warning
Do not use Epivir HBV for treatment of HIV (HIV resistance due to lower dose)
Lamuvidine side effects
HA, N/V/d, fatigue, insomnia, myalgias, increased LFTs, rare risk of pancreatitis
Adefovir brand name (HBV)
Hepsera
Adefovir dosing (HBV)
10 mg daily
Adefovir dose adjustment (HBV)
CrCl
Adefovir boxed warning
May cause HIV resistance in untreated/unrecognized HIV, caution in renal impairment or those at risk of renal toxicity (NSAIDs, nephrotoxic agents)
Adefovir side effects
HA, weakness, abdominal pain, hematuria, rash, nephrotoxicity
Tenofovir brand name (HBV)
Viread
1st line NRTIs (HBV)
Tenofovir, Entecavir
Tenofovir dose (HBV)
300 mg daily
tenofovir dose adjustment (HBV)
CrCl
tenofovir warnings
renal toxicity including acute renal failure and/or Fanconi’s syndrome, osteomalacia, and decreased bone mineral density
tenofovir side effects
N/V/d, HA, depression, renal impairment, decreased bone mineral density, increased LFTs, increased CPK
Entecavir brand name (HBV)
Baraclude
Entecavir dosing (HBV)
NRTI niave: 0.5 mg daily, Lamivudine resistant: 1 mg daily TAKE ON AN EMPTY STOMACH (food reduces AUC, 2 hours before or after a meal)
Entecavir dose adjustment (HBV)
CrCl
Entecavir boxed warning
HIV resistance in untreated or unrecognized HIV infection
Entecavir side effects
peripheral edema, pyrexia, ascites, increased LFTs, nephrotoxcity, increased SCr
Telbivudine brand name (HBV)
Tyzeka
Telbivudine dosing (HBV)
600 mg daily
Telbivudine dose adjustment (HBV)
CrCl
telbivudine side effects
increased CPK, fatigue, HA, increased LFTs
Ribavirin drug interaction with all NRTIs
increase hepatotoxic effects -> lactic acidosis can occur
Lamuvidine drug interaction with SMZ/TMP
increase lamivudine levels due to decreased excetion
Tenofovir drug interaction with didanosine or adefovir
Avoid concomitant use due to increased risk of virologic failure and increase side effects
Telbivudine drug interaction with interferon alfa
Avoid concomitant use due to increased risk of peripheral neuropathy
Ribavirin MOA
inhibits replication of RNA and DNA viruses
Ribavirin indications
HCV in combination with other agents (NEVER MONOTHERAPY); aerosolized ribavirin used for RSV infection
Ribavirin brand name (HCV)
Copegus, Moderiba, Rebetol, Ribasphere, Ribasphere RibaPak
Ribavirin brand name (RSV)
Virazole
Ribavirin dosing (HCV)
400-600 mg BID with food (increased tolerability) SWALLOW WHOLE
Ribavirin dose adjustments
Hgb
Ribavirin boxed warnings
significant teratogenic effects, monotherapy not effect, hemolytic anemia (first 4 weeks)
Ribavirin contrindications
pregnancy, those wishing to become pregnant, male partners of pregnant women, hemoglobinopathies, CrCl
ribavirin side effects
hemolytic anemia (can worsen cardiac disease and lead to MIs, do not use in unstable cardiac disease), fatigue, HA, insomnia, N/V/d, anorexia, myalgias, hyperuricemia
ribavirin monitoring
CBC with differential and PLTs, electrolytes, uric acid, bilirubin, LFTs, HCV-RNA levels, TSH, monthly pregnancy tests
How long after ribavirin to avoid pregnancy
6 months after completing therapy
Ribavirin drug interaction with didanosine
do not use together due to hepatic failure, peripheral neuropathy, and pancreatitis
ribavirin drug interaction with NRTIs
can increased hepatotoxic effects of NRTIs causing lactic acidosis
ribavirin drug interaction with zidovudine
increase risk and severity of anemia from ribavirin
direct acting antivirals indication
treatment of chronic HCV infection in adult patients
direct acting antivirals include
NS3/4A protease inhibitors (simeprevir, paritaprevir), NS5B polymerase inhibitors (sofosbuvir, dasabuvir), NS5a replication complex inhibitors (daclastasvir, ledipasvir, ombitasvir)
medications in Technivie
Ombitasvir, ritonavir boosted paritaprevir
Viekira Pak medications
Ombitasvir, ritonavir boosted partiaprevir, and dasabuvir
Medications in Harvoni
Sofosbuvir and ledipasvir
Simeprevir brand name
Olysio
Simeprevir dosing (HCV)
150 mg daily with food
Simeprevir genetic screening
NS3 Q80K polymorphism screening recommended for HCV genotype 1a being treated with simprevir + ribavirin and Peg-INF-alfa. if positive consider alternate therapy
Simeprevir warnings
serious symptomatic bradycardia (sofosbuvir + amiodarone + another DAA [especially with beta blockers, cardiac conditions, advanced liver disease]), hepatic decompensation and hepatic failure (in advanced / decompensated cirrhosis), photosensitivity, rash
Simeprevir side effects
Rash (photosensitivity), pruritis, myalgia, dyspnea, increased serum bilirubin, nausea, fatigue
Simeprevir monitoring
CBC with differential (anemia and neutropenia), electrolytes, LFTs, HCV-RNA levels