Chemotherapeutic Agents ulit Pt. 2 Flashcards
Inhibits mycobacterial DNA-dependent RNA polymerase and suppresses protein synthesis
Rifabutin
Used to prevent disseminated Mycobacterium avium complex (MAC) disease in clients with advanced HIV infection
Rifabutin
Used to treat active MAC disease and tuberculosis in clients with HIV infection
Rifabutin
Rifapentine
Side and adverse effects
a. Red-orange–colored body secretions
b. Hepatotoxicity
Used only for pulmonary tuberculosis
Rifapentine
Used to treat MDR-TB when significant resistance to other medications is expected
Capreomycin sulfate
Capreomycin sulfate
Side and adverse effects
a. Nephrotoxicity
b. Ototoxicity
c. Neuromuscular blockade
Other Anti-Biotics
Ketolides
- Telithromycin
Lincosamides
- Clindamycin
-Lincomycin
Lipoglycopeptides
- Televancin
Macrolides
- Azithromycin
- Clarithromycin
- Erythromycin
Monobactam
- Aztreonam
binds to specific ribosome subunits, leading to cell death in susceptible bacteria, which includes several strains resistant to other antibiotics
Telithromycin
These drugs are used in the treatment of severe infections when a less-toxic antibiotic cannot be used.
LINCOSAMIDES
are semisynthetic derivatives of vancomycin
LIPOGLYCOPEPTIDES (TELEVANCIN)
They inhibit bacterial cell wall synthesis by interfering with the polymerization and cross-linking of peptidoglycans
LIPOGLYCOPEPTIDES (TELEVANCIN)
It is only approved for use in treating complicated skin and skin-structure infections in adults
LIPOGLYCOPEPTIDES (TELEVANCIN)
LIPOGLYCOPEPTIDES (TELEVANCIN)
ADVERSE EFFECTS:
A transfusion reaction called _____________________ with flushing, sweating, and hypotension can occur with rapid infusion
red man syndrome
is unique, and little cross-resistance occurs
MONOBACTAM (AZTREONAM)
It is effective against gram-negative enterobacteria and has no effect on grampositive or anaerobic bacteria
MONOBACTAM (AZTREONAM)
An infection caused by a fungus is called a
mycosis
AZOLE ANTIFUNGALS
fluconazole (Diflucan), itraconazole (Sporanox), ketoconazole (Nizoral), posaconazole (Noxafi l), terbinafine (Lamisil), and voriconazole (Vfend)
bind to sterols and can cause cell death (a fungicidal effect) or interfere with cell replication (a fungistatic effect)
AZOLE ANTIFUNGALS
Many of the azoles are associated with
liver toxicity
ECHINOCANDIN ANTIFUNGALS
anidulafungin, caspofungin, and micafungin
work by inhibiting glucan synthesis
ECHINOCANDIN ANTIFUNGALS
is an enzyme that is present in the fungal cell wall but not in human cell walls
Glucan
OTHER ANTIFUNGALS
amphotericin B (Abelcet, AmBisome, Amphotec), fl ucytosine (Ancobon), griseofulvin (generic), and nystatin (Mycostatin, Nilstat)
The drug binds to the sterols in the fungus cell wall, changing cell wall permeability AND can lead to cell death (fungicidal effect) or prevent the fungal cells from reproducing (fungistatic effect)
OTHER ANTIFUNGALS
TOPICAL ANTIFUNGALS
ketoconazole ( Nizoral,), sertaconazole nitrate (Ertaczo),
sulconazole (Exelderm), terbinafine (Lamisil)
Fungi that cause mycoses
DERMATOPHYTES
mycoses include tinea infections such as
- athlete’s foot (tinea pedis),
- jock itch (tinea cruris),
- yeast infections of the mouth and vagina
work to alter the cell permeability of the fungus, causing prevention of replica and fungal death
TOPICAL ANTIFUNGALS
These drugs are not absorbed systemically and do not undergo metabolism or excretion in the body
TOPICAL ANTIFUNGALS
single-celled organisms that pass through several stages in their life cycles
Protozoa
thrive in tropical climates, but may also survive and reproduce in any area where people live in very crowded and unsanitary conditions
Protozoa
protozoal infections can be caused by insect bites
malaria
trypanosomiasis
leishmaniasis)
those that result from ingestion
amebiasis
giardiasis
trichomoniasis
is a parasitic disease through the bite of a female Anopheles mosquito, an insect that harbors the protozoal parasite
MALARIA
FOUR PROTOZOAL PARASITES
Plasmodium falciparum
Plasmodium vivax
Plasmodium malariae
Plasmodium ovale
s considered to be the most dangerous type of protozoan
Plasmodium falciparum
causes a milder form of the disease, which seldom results in
death.
Plasmodium vivax
is endemic in many tropical countries and causes very mild
signs and symptoms in the local population
Plasmodium malariae
which is rarely seen, seems to be in the process of being
eradicated.
Plasmodium ovale
are usually given in com bination form to attack the Plasmodium
ANTI-MALARIALS
ANTI-MALARIALS drugs can be:
schizonticidal
gametocytocidal
sporonticidal
schizonts as prophylactic and antirelapse agents
-acting against the red-blood-cell phase of the life cycle,
schizonticidal
-acting against the gametocytes
gametocytocidal
acting against the parasites that are developing in the mosquito
sporontocidal
work against tissue
chizonts as prophylactic or antirelapse agents
is currently the mainstay of antimalarial therapy
Chloroquine
directly toxic to parasites that absorb it; it is acidic, and it decreases the ability of the parasite to synthesize DNA, leading to a blockage of reproduction.
Chloroquine
increases the acidity of plasmodial food vacuoles, causing cell rupture and death.
Mefloquine
disrupts the mitochondria of the Plasmodium, causes death of gametocytesan d prevents other forms from reproducing.
Primaquine
is used in combination to suppress malaria; it acts by blocking the use of folic acid in protein synthesis by the Plasmodium
Pyrimethamine
inhibits nucleic acid synthesis, protein synthesis, and glycolysis in P. falciparum
Quinine
ADVERSE EFFECTS
ANTI-MALARIALS
may occur with high levels of quinine or primaquinemay occur with high levels of quinine or primaquine
Cinchonism
an intestinal infection caused by Entamoeba histolytica, is often known as amebic dysentery
Amebiasis
Early signs of amebiasis include
mild to fulminate diarrhea
the protozoan can live for long periods outside the body or in the human intestine
Cystic, dormant stage
in the ideal environment—the human large intestine
Trophozoite stage
is a disease caused by a protozoan that is passed from sand fl ies to humans.
Leishmaniasis
fly injects an asexual form of this flagellated protozoan and digested by human macrophages
promastigote
formed inside the macrophages as the promastigote divides
amastigotes
is caused by infection with Trypanosoma
Trypanosomiasis
caused by Trypanosoma brucei gambiense, (transmitted by the tsetse fly)
African sleeping sickness
invades the CNS, leading to an acute inflammation that results in lethargy, prolonged sleep, and even death.
African sleeping sickness
which is caused by Trypanosoma cruzi
Chagas’ disease
his protozoan results in a severe cardiomyopathy that accounts for numerous deaths and disabilities in South American regions.
Chagas’ disease
Trichomonas vaginalis, is a common cause of vaginitis
Trichomoniasis
caused by Giardia lamblia, which survive outside the body and allow transmission through contaminated water or food, and trophozoites.
Giardiasis
- is an endemic protozoan that does not usually cause
illness in humans. - immune system becomes suppressed because of acquired immune deficiency syndrome (AIDS) or AIDS-related
complex
Pneumocystis jiroveci Pneumonia
Other antiprotozoals include
atovaquone (Mepron)
metronidazole (Flagyl, MetroGel, Noritate)
nitazoxanide (Alinia)
pentamidine (Pentam 300, NebuPent)
tinidazole (Tindamax)
OTHER PROTOZOAL AGENTS
CONTRAINDICATIONS AND CAUTIONS
_______________ should never be combined with alcohol and should be used with caution in patients with renal dysfunction
Tinidazole
infections in the gastrointestinal (GI) tract or other tissues due to worm infestation
HELMINTHIC INFECTIONS
is the disease caused by ingestion of the encysted larvae of the roundworm, Trichinella spiralis, in undercooked pork.
Trichinosis
refers to infection of the blood and tissues of healthy individuals by worm embryos, which enter the body via insect bites.
Filariasis
is a platyhelminthic infection by a fluke that is carried by a snail.
Schistosomiasis
act on metabolic pathways that are present in the invading worm but are absent or significantly different in the human host.
ANTI-HELMINTHIC DRUGS
ANTI-HELMINTHIC DRUGS
albendazole (Albenza)
ivermectin (Stromectol)
mebendazole (Vermox)
praziquantel (Biltricide)
pyrantel (Antiminth, Pin-Rid, Pin-X, Reese’s Pinworm)
- particle is composed of a piece of DNA or RNA inside a protein.
- replicates in the host cell
virus
act to prevent the replication of that particular virus
Interferons
Agents for Influenza A and Respiratory Viruses
amantadine
oseltamivir
ribavirin
rimantadine
zanamivir
invade the respiratory tract and cause the signs and symptoms of respiratory “flu. ”
Influenza A, B and RSV
AGENTS FOR INFLUENZA A AND RESPIRATORY VIRUSES
Therapeutic Actions and Indications
_________________ is the only antiviral agent that is effective in treating H1N1 and avian flu
Oseltamivir
Herpes viruses account for a broad range of conditions:
cold sores, encephalitis,shingles,genital infections
different since it can affect the eye, respiratory tract, and liver and reacts to many of the same drug
Cytomegalovirus (CMV)