Antifungal drugs, also known as antimycotics, are used to treat and prevent fungal infections like athlete's foot, ringworm, thrush, and more serious systemic infections. There are different types of antifungal agents that work by various mechanisms. Polyene antibiotics like amphotericin B and nystatin bind to ergosterol in the fungal cell membrane, increasing permeability and loss of intracellular contents. Azoles inhibit ergosterol synthesis and have broad antifungal activity. Other classes of antifungals include allylamines, pyrimidines, thiocarbamates, and nonpolyene antibiotics like griseofulvin that inhibit fungal growth.
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classification of antiviral agents,replication of HIV virus and replication of virus.targets of virus,classification of antiviral agents with structure and mechanism action of antiviral agents
An antifungal medication is a pharmaceutical fungicide used to treat and prevent mycoses such as athlete's foot, ringworm, candidiasis (thrush), serious systemic infections such as cryptococcal meningitis, and others. Such drugs are usually obtained by a doctor's prescription, but a few are available OTC (over-the-counter).
Antifungals work by exploiting differences between mammalian and fungal cells to kill the fungal organism with fewer adverse effects to the host. Unlike bacteria, both fungi and humans are eukaryotes. Thus, fungal and human cells are similar at the biological level. This makes it more difficult to discover drugs that target fungi without affecting human cells. As a consequence, many antifungal drugs cause side-effects. Some of these side-effects can be life-threatening if the drugs are not used properly.
Anthelmintics | B.Pharm 3rd year 2nd Sem | Medicinal Chemistry-III | History, Classification, Structures & Synthesis of anthelmintics, Synthesis of Diethylcarbamazine citrate, Synthesis of Mebendazole
The presentation gives an in-depth review of the Anti-fungal drugs used to treat various acute and chronic fungal infections along with their uses and MOA.
An antifungal medication is a pharmaceutical fungicide used to treat and prevent mycoses such as athlete's foot, ringworm, candidiasis (thrush), serious systemic infections such as cryptococcal meningitis, and others. Such drugs are usually obtained by a doctor's prescription, but a few are available OTC (over-the-counter).
Antifungals work by exploiting differences between mammalian and fungal cells to kill the fungal organism with fewer adverse effects to the host. Unlike bacteria, both fungi and humans are eukaryotes. Thus, fungal and human cells are similar at the biological level. This makes it more difficult to discover drugs that target fungi without affecting human cells. As a consequence, many antifungal drugs cause side-effects. Some of these side-effects can be life-threatening if the drugs are not used properly.
Anthelmintics | B.Pharm 3rd year 2nd Sem | Medicinal Chemistry-III | History, Classification, Structures & Synthesis of anthelmintics, Synthesis of Diethylcarbamazine citrate, Synthesis of Mebendazole
The presentation gives an in-depth review of the Anti-fungal drugs used to treat various acute and chronic fungal infections along with their uses and MOA.
Medicinal Chemistry and Pharmacology of Antifungal Agents and how to take care from fungal infections. Useful Course study material for the undergraduate , postgraduate and aspirants of Pharmacy , Pharmacology and Medicinal Chemistry.
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Ethnobotany in herbal drug evaluation,
Impact of Ethnobotany in traditional medicine,
New development in herbals,
Bio-prospecting tools for drug discovery,
Role of Ethnopharmacology in drug evaluation,
Reverse Pharmacology.
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The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
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2. INTRODUCTION
An antifungal drug, also known as an antimycotic drug, is a
pharmaceutical fungicide or fungistatic used to treat and prevent
mycosis such as athlete's foot, ringworm, candidiasis (thrush), serious
systemic infections such as cryptococcal meningitis, and others.
3. TYPES OF FUNGAL INFECTIONS
1. Superficial :
Affect skin – mucous membrane.
Fungi that affect keratin layer of skin, hair, nail.
Example: Tinea pedis, ring worm infection
Candidiasis : Yeast-like, oral thrush, vulvovaginitis, nail infections.
2. Deep infections
Affect internal organs such as lung ,heart , brain leading to
pneumonia , endocarditis , meningitis.
5. POLYENE ANTIBIOTICS
Amphotericin B and Nystatin bind to the fungal cell membrane
component ergosterol, leading to increased fungal cell membrane
permeability and the loss of intracellular constituents.
Amphotericin B and Nystatin bind to the fungal cell membrane
component ergosterol, leading to increased fungal cell membrane
permeability and the loss of intracellular constituents.
AMPHOTERICIN
Amphotericin A & B are antifungal antibiotics.
Amphotericin A is not used clinically.
It is a natural polyene macrolide (polyene =
many double bonds ) (macrolide = containing a
large lactone ring )
NYSTATIN
Nystatin (originally named Fungicidin) is a polyene
antifungal medication to which many molds and
yeast infections are sensitive, including Candida.
Due to its toxicity profile, there are currently no
injectable formulations of this drug on the US
market.
However, nystatin may be safely given orally as well
as applied topically due to its minimal absorption
through mucocutaneous membranes such as the gut
and the skin
6. AMPHOTERICIN B NYSTATIN
ALLYLAMINES
Allylamines inhibit the enzyme squalene epoxidase, another enzyme required for
ergosterol synthesis:
• Terbinafine - marketed as Lamisil
• Amorolfine
• Naftifine
• Butenafine
7. ANTIFUNGAL AZOLES
Antifungal Azoles are synthetic drugs with broad-spectrum fungistatic
activity.
Azoles can be divided into two groups: the older imidazole agents
(clotrimazole, ketoconazole, miconazole) in which the five-member
azole nucleus contains two nitrogens and the newer triazole
compounds (fluconazole, itraconazole, and voriconazole), in which the
azole nucleus contains three nitrogens.
8. PYRIMIDINES
Flucytosine (5-flucytosine, 5-FC) is an analogue of cytosine that was
originally synthesized for possible use as an antineoplastic agent.
5-FC is converted to 5-fluorouracil inside the cell by the fungal
enzyme cytosine deaminase.
The active metabolite 5-fluorouracil interferes with fungal DNA
synthesis by inhibiting thymidylate synthetase.
Incorporation of these metabolites into fungal RNA inhibits protein
synthesis.
Flucytosine has a significant antifungal activity against Candida spp.
and the fungal organisms responsible for chromomycosis.
THIOCARBAMATES
Tolnaftate is an antifungal agent effective in the topical treatment of
dermatophyte infections and tinea.
9. NONPOLYENE ANTIBIOTICS
Griseofulvin is an oral fungistatic agent used in the long-
term treatment of dermatophyte infections caused by
Epidermophyton, Microsporum, and Trichophyton spp.
Produced by Penicillium griseofulvin, it inhibits fungal
growth by binding to the microtubules responsible for mitotic
spindle formation.
The drug binds to keratin precursor cells and newly
synthesized keratin in the stratum corneum of the skin, hair,
and nails, stopping the progression of dermatophyte infection.
In the treatment of ringworm of the beard, scalp, and other
skin surfaces, 4 to 6 weeks of therapy is often required.