Pharma Least C Flashcards
Ethanol& isopropyl alcohol
Disinfectants and antiseptics
Alcohols
Chlorhexidine
Antiseptic & disinfectant
Chlorinated phenols
Hydrogen peroxide H2O2
Oxidising agents
Disinfectants and antiseptics
Povidone iodine
Halogens
Disinfectants antiseptics
Invert soaps
Disinfectants and antiseptics
Cationic surfactant
Octenidine dihydrochloride
Disinfectants and antiseptics
Cationic surfactant
Povidone iodine
Disinfectants and antiseptics
Halogens
Rifampin
Antimycobacterial drug
Mechanism of action:
- Inhibition of DNA-dependent RNA polymeraseàinhibition of transcription
- Bactericidal effect, long PAE
Spectrum + clinical effect:
- M. tuberculosis, M. kansasii, M. avium, M. leprae
- Use: TB treatment, leprosy treatment, prophylaxis
Isoniazid
Antimycobacterial drug
Mechanism of action:
- Inhibits synthesis of mycolic acidàbactericidal effect Spectrum + clinical effect:
- Most important drug used in TB treatment
Pyrazinamide
Antimycobacterial drugs
Mechanism of action:
- Inhibits CoA synthesisàbacteriostatic effect
Spectrum + clinical effect:
- Acts against M. tuberculosis only
Ethambutol
Antimycobacterial drugs
Mechanism of action:
- Inhibits cell wall synthesis (arabinogalactan) Spectrum + clinical effect:
- Mycobacteria only
Streptomycin & Kanamycin
Antimycobacterial drugs 2nd line agent
Mechanism of action:
- Protein synthesis inhibitor (aminoglycoside)àbactericidal effect
Spectrum + clinical effect:
- Streptomycin: Acts only against free mycobacteria (M. kansasii and avium are
resistant)àCOMBINATION TREATMENT!
Dapson
Antimycobucterial drug
Mechanism of action:
- Inhibits folic acid synthesisàbacteriostatic effect
Spectrum + clinical effect:
- Leprosy (M. leprae), pneumocystitis jirovecii pneumonia in AIDS patients
Cycloserine
Antimycobacterial drugs
Mechanism of action:
- Cell wall synthesis inhibitoràinhibit peptidoglycan synthesis
Spectrum + clinical effect:
- TB resistant to 1st line agents
Chloroquine
Antiprotozoal drug
Mechanism:
- Blood schizonticideàinhibit heme-polymeraseàIC heme accumulation is toxic
for the parasite Uses:
- Treatment + prophylaxis for malaria (P. falciparum)
Mefloquine
Antiprotozoal drugs
Similar to chloroquine, slower acting
- Mostly for prophylaxis
Atovaquone/proguanil
Antiprotozoal
Mechanism:
- Atovaquone: inhibits mitochondrial metabolism
- Proguanil: antimetaboliteàanti-folate drug
Uses:
- Treatment + prophylaxis of MDR P. falciparum
Primaquine
Antiprotozoal
Mechanism:
- Tissue schizonticideàkills schizonts in the liver Uses:
- Recurrent malaria
- Eradication of liver stages of P. vivax and P. ovale
Metronidazole
Antiprotozoal
Mechanism of action:
- Interferes with nucleic acid synthesisàproduces toxic intermediary metabolites Spectrum + clinical effect:
- Protozoans (trichomonas, G. lamblia, amoeba, Gardnerella vaginalis)
- Anaerobic gram (-) bacteria
Mebendazole
Antihelmintic drug
Mechanism:
- Inhibits microtubule synthesis + glucose uptake
Uses:
- Roundworms + tapeworms (Ascaris lumbricoides, Enterobius vermicularis, Trichuris
trichuria)
Ivermectin
Antihelmintic drugs
Mechanism:
- Enhances GABA-mediated transmission in roundwormsàimmobilization
Uses:
- RoundwormsàWuchereria bancrofti (filaria)
Niclossmide
Antihelmintic drug
Mechanism:
- Inhibits oxidative phosphorylation Uses:
- Tapeworms (taenia saginata + solium)
Quinine
Antiprotozoal
Blood schizonticide
- Inhibit protozoal DNA
replication
Arthemether
Antiprotozoal
Blood schizonticide
- Production of free radicals
within the plasmodium food vacuoles
Treatment of multidrug- resistant malaria
- Effective against quinine- resistant strains
Niclosamid
Antihelmintic drug
Uncoupling oxidative phosphorylation
Tapeworms:
- Taenia saginata
(beef tapeworm)
- Taenia solium
(pork tapeworm)
- Diphyllobothrium latum
(fish tapeworm
Ivermectin
Antihelmintic drug
Facilitates GABA-mediated transmission in nematodes and causes immobilization of parasites
Intestinal nematodes:
- Strongyloides stercoralis
Tissue/blood nematodes:
- Cutaneous larva migrans
- Oncocerca volvulus
Lumefantrine
Antiprotozoal
Blood schizonticide
- Mechanism unknown In combination with artemether against P. falciparum
Clotrimazole
Antifungal drug
Azoles
Topical formulations treat dermatophytes, superficial candidiasis, vaginal candidiasis
- Available as over-the-counter drug
Itraconazole
Antifungal drug
Azoles
Dimorphic fungi, Blastomyces and Sporothrix infections
- 2nd-line agent for Aspergillus, Coccidioides, Cryptococcus, Histoplasma
Fluconazole
Antifungal
Azoles (trizole 1 St gen)
Esophageal, oropharyngeal, vaginal, and invasive candidiasis
- Coccidioides infections
- Cryptococcus meningitis
Voriconazole
Antifungal drug
Azoles ( trazoles 2nd gen )
Aspergillus infections
- Invasive candida infections (including
sepsis)
Amphoterecin B & nystatin
Antifungal drugs
Polyenes
Amphoteric compounds with both polar and nonpolar structural components →
interact with ergosterol in fungal membranes to form ‘pores’, which disrupt membrane permeability
- Fungicidal effect
- Resistant fungal strains appear to have low ergosterol content in their cell membranes
Caspofugin
Antifungal drug
Echinocandias
Inhibit the synthesis of β(1-3)-glucan, a critical component of fungal cell wall
Candida infections failed to respond to amphotericin B (disseminated and mucocutaneous infections)
- Mucor infection
- Aspergillus infection
Flucyrosine (5-FC)
Antifungal drug
Antimetabolites
Activated by fungal cytosine deaminase to 5-fluorouracil (5-FU), which after tri- phosphorylation is incorporated into fungal RNA
- 5-FU also forms 5-Fd-UMP, which inhibits thymidylate synthase → thymine ↓ (inhibits DNA synthesis)
- Resistance emerges rapidly if used alone; involves decreased activity of the fungal permease
Terbinafine
Antifungal drug
Inhibits squalene epoxidase, interfering with ergosterol synthesis (fungal membrane)
- Fungicidal effect
Systemic drug
Acyclovir
Antiviral
Agents against HSB q/2 VZV
Mechanism of action:
- Guanosine analog
- Acyclovir is converted to its triphosphate form, acyclovir
triphosphate (ACV-TP)àinhibits viral DNA polymerase
- Resistance: involves changes of viral DNA polymerase or
decreased activity of kinase
Ganciclovir
Antiviral
Agents against CMV
Mechanism of action:
- Deoxy-guanosine analog
- Mechanism similar to acyclovir
Spectrum + clinical effect:
- CMV (1st line agent), HSV-1/2, VZV to a lesser extent
Foscarnet
Antiviral drug
Mechanism of action:
- Pyrophosphate analog + not an antimetabolite
- Inhibits viral RNA- and DNA polymerase
Spectrum + clinical effect:
- CMV (2nd line agent)
- Use: CMV retinitis in HIV/AIDS patients, resistant HSV/CMV infections
Oseltamivir
Antiviral agent
Anti influenza agent
Mechanism of action:
- Inhibit neuraminidaseàneuraminidase usually cleave sialic acid bridges and thereby release the ready virion from the cellàprevent this, so the virus is unable to infect new cells
Spectrum + clinical effect:
- Influenza A + B virus