Exam 3 Flashcards
class of Clotrimazole/ Lotrimin
antifungal
indication of Clotrimazole/ Lotrimin
superficial mycoses such as tinea pedis, tinea cruris and ring worm as well as yeast vaginitis
MOA of Clotrimazole/ Lotrimin
binds to ergosterol molecules on the fungal cell membrane and causes membrane leakage during cell division
class of Nystatin/ Mycostatin
antifungal, may be used both topically and systemically
indication of Nystatin/ Mycostatin
superficial mycoses such as ring worm, tinea pedis, tinea cruris and treatment of oral candidiasis (thrush) as well as esophageal and vaginal Candida Cryptococcus is also sensitive to Nystatin
MOA of Nystatin/ Mycostatin
binds to ergosterol molecules on fungal cell membrane resulting in loss of membrane integrity death of the fungal cell
Nystatin/ Mycostatin is used as prophylaxis in patients who are at risk for
fungal infections, such as AIDS patients with a low CD4+ count and patients receiving chemotherapy
side effects of Nystatin/ Mycostatin
negligible oral absorption allows for diminished side effects. N/V possible. GI absorption also minimal and most orally administered Nystatin is passed unchanged in stool.
current drug of choice for onychomycosis
Terbinafine/ Lamisil
Terbinafine/ Lamisil is mainly effective on group of fungi known as
dermatophytes
Terbinafine/ Lamisil treats onychomycosis of the toenail or fingernail due to
dermatophyte Tinea unguium
common side effects of Terbinafine/ Lamisil
discomfort, diarrhea, and nausea as well as headache. Less commonly, elevated liver enzymes, hepatitis, liver damage and even liver failure have been reported
class of Fluconazole/ Diflucan
antifungal, both topical and systemic
indication of Fluconazole/ Diflucan
superficial mycoses such as yeast vaginitis as well as systemic or meningeal mycotic infections by fungi such as Cryptococcus or Histoplasmosis
MOA of Fluconazole/ Diflucan
inhibits fungal membrane synthesis
anti-fungal that can be used as vaginal suppository for yeast vaginitis
Fluconazole/ Diflucan
Fluconazole/ Diflucan can inhibit
cytochrome enzyme systems responsible for metabolism of many drugs
side effects of Fluconazole/ Diflucan
nausea and vomiting with oral and IV doses
class of Amphotericin B/Amphocil
antimycotic
indication of Amphotericin B/Amphocil
systemic fungal infections such as systemic Candidadiasis, Histoplasmosis, Coccidiomycosis, Aspergillus and Blastomyces
MOA of Amphotericin B/Amphocil
binds to ergosterol molecules on the fungal cell membrane and disrupts membrane integrity, resulting in death of the fungal cell
Amphotericin B/Amphocil may for used via intrathecal route for
fungal meningitis or fungal brain abscess
side effects of Amphotericin B/Amphocil
Very severe side effect profile. Fevers and shaking chills are common. (“Ampho-terrible” and “shake and bake” are terms used to describe the severe side effects). Pre-treatment with Benadryl, NSAIDs or Prednisone often used to mitigate the fever and chills. Hypotension, renal impairment and severe anemia can occur.
Isoniazid (INH) / Nitrazid class
antibiotic
indication of Isoniazid (INH) / Nitrazid
tuberculosis
MOA of Isoniazid (INH) / Nitrazid
Isoniazid is a pro-drug and must be activated by bacterial catalase. The activated form of INH inhibits the synthesis of mycolic acid in the mycobacterial cell wall
lower doses of Isoniazid (INH) / Nitrazid should be given to patients with
chronic liver disease
side effects of Isoniazid (INH) / Nitrazid
rash, abnormal liver function tests, hepatitis, sideroblastic anemia, peripheral neuropathy and CNS effects. The possible hepatotoxicity of INH is best avoided by close clinical monitoring of the patient, specifically for signs of nausea, vomiting, and abdominal pain as well as monitoring liver function tests
Isoniazid competes with an enzyme that is needed to produce
pyridoxine
peripheral neuropathy is a common side effect when using ____ and is caused by
when using Isoniazid and is caused by INH induced pyridoxine deficiency
peripheral neuropathy caused by ___ may be reduced or avoided altogether by concurrent
caused by Isoniazid, avoided by supplementation with pyridoxine (vit B6 - 10to 50 mg/day)
class of Rifampin/ Rifadin
antibiotic
indication of Rifampin/ Rifadin
tuberculosis, Methicillin-resistant Staphylococcus aureus (MRSA) and prophylactic therapy against meningococcal infection from Neisseria meningitidis
MOA of Rifampin/ Rifadin
inhibits DNA-dependent RNA polymerase in bacterial cells thus preventing transcription of messenger RNA and subsequent translation to protein production
weird side effect of Rifampin/ Rifadin
can cause certain bodily fluids, such as urine and tears, to become orange-red in color. may permanently stain soft contain lenses
side effects of Rifampin/ Rifadin
fever, upset stomach, nausea, vomiting, rash. hepatotoxicity with liver damage and jaundice can occur. liver function tests must be followed.
Standard treatment of TB
Rifampin/Rifadin, Isoniazid (INH)/Nitrazid, Pyrazinamide/Pyrazinamide, Ethambutol/Myambutol
drug that is a nicotinamide analog with an unknown mechanism of action
Pyrazinamide
MOA of Ethambutol
inhibits mycolic acid synthesis in the mycobacterial cell wall
the drugs utilized for M. tuberculosis can also be used for other mycobacterial diseases such as
leprosy
Multi-drug resistant tuberculosis (MDR-TB) is defined as TB that is resistant to at least
Isoniazid and Rifampin
Rick factors for MDR-TB include
exposure to patient with MDR-TB, HIV infection, previous incarceration, failure to respond to standard TB treatment, and relapse following standard TB treatment
acronym for CDC recommended empiric treatment of patient suspected of having MDR-TB
SHREZ MC
7 drugs that make up SHREZ MC are
Streptomycin + Hydrazine + Rifampin + Ethambutol + pyraZinamide + Moxifloxacin (a fluoroquinolone) and Cycloserine (a broad spectrum antibiotic)
Viruses that can be treated with anti-virals
URI viruses including influenza types A and B and respiratory syncytial virus (RSV)…herpesviruses, cytomegalovirus, HIV, viral hepatitis B and C
US Centers for Disease Control and Prevention recommends the use of what for treatment/prevention of swine flu virus
Tamiflu (Oseltamivir) or Relenza (Zanamivir)
class of Oseltamivir/ Tamiflu
anti-viral
indication of Oseltamivir/ Tamiflu
treatment (and prevention) of infections due to influenza A and B virus in adults and in children at least one year of age - when given within 48 hours of symptoms of infections. Tamiflu has also shown effectiveness for H5N1 known as avian flu.
how soon do you need to administer Oseltamivir/ Tamiflu for it to be effective
within 48 hours of symptoms
MOA of Oseltamivir/ Tamiflu
neuramidase inihbitiion, preventiing virus from budding off from cell. Oseltamivir/ Tamiflu was first orally active neuraminidase inhibitor to be commercially developed.
doses of Oseltamivir/ Tamiflu are decreased for children and patients with
renal impairment
side effects of Oseltamivir/ Tamiflu
abdominal pain nausea, vomiting and headache…concern about potential adverse effects including delirium, hallucinations, depression and increased suicidal ideation
Zanamivir/ Relenza is formulated as a
powder that is delivered via the respiratory tract by an oral inhaler
Zanamivir/ Relenza is not recommended in people with
history of asthma or COPD due to risk of serious bronchospasm
class of Zanamivir/ Relenza
anti-viral
indication of Zanamivir/ Relenza
influenza treaetment and/or prophylaxis
MOA of Zanamivir/ Relenza
neuramidase inhibitor
route of Zanamivir/ Relenza
inhaled route
side effects of Zanamivir/ Relenza
N/V. Post treatment diarrhea, vaginal candidiasis and thrush is negligible.
drug that is used as a treatment for the early stages of Parkinson’s disease
Amandatine/ Symmetrel…best used as short term therapy (6-12 months)…its an anti-viral that was recommended as prophylaxis for influenza
primary drug for herpesvirus infection
Acyclovir/Zovirax
class of Acyclovir/ Zovirax
anti-viral
indication of Acyclovir/ Zovirax
herpesvirus infections such as HSV-1, HSV-2 and Herpes zoster (chicken pox and shingles)
MOA of Acyclovir/ Zovirax
guanosine analog that is incorporated into the virus DNA and inhibits further viral synthesis
Acyclovir/ Zovirax only works against
viruses that are actively replicating and is ineffective against latent viruses
Does Acyclovir/ Zovirax actively cross the blood barrier?
Yes. It can be used to treat herpes meningitis and encephalitis.
Bizarre possible form of Acyclovir/ Zovirax
topical ointment
side effects of Acyclovir/ Zovirax
Dependent upon route of administration. Headache, nausea and vomiting can occur with oral dose. Transient renal insufficiency can occur with higher IV doses and skin irritation can occur with topical doses.
current treatment for HIV infection consists of
Highly Active Antiretroviral Therapy or HAART
4 main categories of drugs used as treatment or prophylaxis against HIV
reverse transcriptase inhibitors (RTIs), protease inhibitors (PIs), fusion inhibitors, integrase inhibitors
standard HAART drug classes
two nucleoside reverse transcriptase inhibitors plus either a non-nucleoside reverse transcriptase inhibitor (NNRTI) or a protease inhibitor (PI).
what do RTIs do
block enzymatic function of reverse transcriptase and prevent the completion of synthesis of double-stranded viral DNA thus preventing HIV from multiplying.
3 main forms of RTIs
Nucleoside reverse transcriptase inhibitors, Nucleotide reverse transcriptase inhibitors, Non-nucleoside reverse transcriptase inhibitors
primary Nucleoside reverse transcriptase inhibitor
Zidovudine (AZT)/ Retrovir
class of Zidovudine (AZT)/ Retrovir
anti-viral, nucleoside reverse transcriptase inhibitor
indication of Zidovudine (AZT)/ Retrovir
HIV
MOA of Zidovudine (AZT)/ Retrovir
pyrimidine analog that is incorporated into the viral DNA by reverse transcriptase. Incorporation into viral DNA terminates further replication
side effects of Zidovudine (AZT)/ Retrovir
Headaches are common. Potentially toxic to bone marrow with severe anemia and leukopenia in patients receiving high doses.
Unlike nucleoside RTIs, which bind at the enzyme’s active site, NNRTIs bind within
a pocket termed the NNRTI pocket
____ inhibitors are currently used to treat HIV and Hep C
protease inhibitors
primary protease inhibitor
Saquinavir/ Invirase
class of Saquinavir/ Invirase
anti-viral, protease inhibitor
indication of Saquinavir/ Invirase
HIV, Hep C
MOA of Saquinavir/ Invirase
Protease enzyme inhibition prevents viral protein molecules from being cleaved into smaller fragments, which prevents both the replication of the virus within the cell and the release of mature viral particles from an infected cell.
side effects of Saquinavir/ Invirase
Mostly G.I. i.e. abdominal discomfort, nausea, vomiting and diarrhea.
interferon alpha is for
Hep C
Interferon Beta is for
relapsing multiple sclerosis
interferon gamme is for
chronic granulomatous diseases
class of Interferon alpha
anti-viral
indication of Interferon alpha
chronic hep B and C, genital warts due to HPV, Kaposi’s sarcoma and hairy cell leukemia
MOA of Interferon alpha
Interferon is a naturally occurring glycoprotein that interferes with the ability of a virus to infect cells. Interferon appears to induce host cell enzymes that inhibit viral RNA translation and subsequent viral synthesis within the infected host cell.
Side effects of Interferon alpha
Arthralgias, myalgias, fever, lethargy, headache, dizziness, hair thinning and depression.
what is Pegylated interferon alpha
a form of interferon in which polyethylene glycol is added to make the interferon last longer in the body.
When treating hepatitis C, pegylated interferon is often administered with the drug
Ribavirin
what type of vaccine is most likely to confer life-long immunity
live/attenuated virus vaccinations
live vaccinations are typically not given to
people who are immunocompromised