IMIDIL VAGINAL INSERT

Indications

• Vaginal candidiasis
• Vulval candidiasis
• Superficial fungal infections
• Otitis externa (as part of combination therapy)

Dosage

Adults: For vaginal candidiasis, 1 pessary of 500 mg can be inserted at night. Alternatively, for treatment with 1% cream, apply 2–3 times a day to the affected area for at least 14 days. For recurrent vulvovaginal candidiasis

Mechanism of action

Clotrimazole acts primarily by damaging the permeability barrier in the cell membrane of fungi. It inhibits ergosterol biosynthesis, which is essential for maintaining the integrity of fungal cell membranes. The inhibition of lanosterol 14-demethylase (CYP51) is a key mechanism behind its antifungal properties, leading to decreased ergosterol synthesis and resulting in cell membrane dysfunction. Clotrimazole also affects calcium homeostasis by inhibiting sarcoplasmic reticulum Ca2+-ATPase and blocking calcium-dependent potassium channels, contributing to its overall pharmacological effects.

Pharmacodynamics

Clotrimazole is considered a broad-spectrum antifungal that alters the permeability of fungal cell membranes, leading to inhibition of growth in pathogenic yeasts. At lower concentrations, it exhibits fungistatic properties, while at higher concentrations, it may be fungicidal against certain strains like Candida albicans. However, resistance to clotrimazole has become more common in recent years, limiting its efficacy in some populations.

Pharmacokinetics

Clotrimazole is primarily applied topically, and its absorption varies depending on the formulation and site of application. Following topical administration, systemic absorption is minimal, thereby reducing the risk of systemic side effects. The drug is metabolized in the liver and excreted via urine and feces. The pharmacokinetics may differ based on the dosing regimen and specific formulation used.

Contra-indications

• Hypersensitivity to clotrimazole or any excipients in the formulation
• Not recommended if trying to conceive due to potential damage to latex condoms and diaphragms

Adverse effects

• Skin reactions
• Vaginal burning
• Angioedema

Interactions

• Clotrimazole may increase the exposure of lomitapide, though the specific nature of this interaction is unknown

Precautions

• Avoid use in pregnancy without medical advice
• Use caution in patients with a history of hypersensitivity reactions

Pregnancy

Clotrimazole should be used during pregnancy only if clearly needed. Oral antifungal treatments should be avoided.

Breast-feeding

Clotrimazole is excreted in breast milk; caution is advised when used in breastfeeding mothers.

Storage

Store in a cool, dry place, away from direct sunlight. Keep out of reach of children.

Formulations

• Clotrimazole 1% cream
• Clotrimazole 2% cream
• Clotrimazole 500 mg vaginal pessaries
• Clotrimazole 10% vaginal cream
• Clotrimazole 1% solution (ear drops)

Indications

• Contraception
• Hormone replacement therapy
• Vaginal candidiasis
• Bacterial vaginosis
• Menopausal symptoms
• Sexually transmitted infections

Dosage

Children: Refer to specific product guidelines for dosing information.

Adults: Refer to specific product guidelines for dosing information.

Mechanism of action

Inserts release their active pharmaceutical ingredients (APIs) via diffusion and dissolution processes. Depending on the specific drug contained, the mechanism may involve local hormonal effects, such as estrogen or progesterone receptors activation, or antimicrobial action through direct contact with pathogens.

Pharmacodynamics

The pharmacodynamic profile of inserts depends on the active ingredient. For hormonal inserts, they typically modulate the menstrual cycle and reproductive functions by interacting with specific hormone receptors. Antimicrobial inserts may exert their effects by disrupting bacterial cell walls or inhibiting nucleic acid synthesis in pathogens, leading to their death or incapacitation.

Pharmacokinetics

Inserts generally exhibit localized absorption, resulting in minimal systemic circulation of the active ingredient. The onset of action can vary based on the formulation and the API, with some effects being observed within hours, while others may take longer. The half-life and elimination will depend on the specific drug used within the insert, as well as individual patient factors.

Pregnancy

Safety during pregnancy is not well established; use only if clearly needed and the benefits outweigh the risks.

Breast-feeding

Caution is advised; consult a healthcare professional.

Storage

Store at room temperature, away from moisture and heat.

Indications

• Bacterial vaginosis
• Candidiasis (yeast infection)
• Trichomoniasis
• Hormonal replacement therapy
• Contraception
• Local treatment of vulvovaginal atrophy

Dosage

Children: Refer to specific product guidelines and consult pediatric dosing references, as dosing for children may differ significantly from adults.

Adults: Refer to specific product guidelines for dosing instructions, as vaginal drug dosages can vary widely based on the formulation and indication.

Mechanism of action

Vaginal medications typically exert their effects locally at the site of application. For instance, antifungal agents work by disrupting the cell membrane of fungi, leading to cell death. Hormonal treatments may act by binding to specific receptors, modulating local tissue responses. The specific mechanism varies by drug class, with some agents enhancing local immune responses or altering the vaginal microbiota.

Pharmacodynamics

The pharmacodynamics of vaginal medications depend on their formulation and active ingredients. Antifungals such as clotrimazole alter fungal cell membrane permeability, while hormonal preparations like estrogen can promote tissue regeneration and maintain vaginal pH. The local environment, including the presence of vaginal flora and pH, can significantly influence the efficacy of these medications.

Pharmacokinetics

Pharmacokinetics of vaginal drugs vary widely. Local absorption into the systemic circulation is generally low, which minimizes systemic side effects. However, some drugs may still be absorbed, leading to systemic effects. The onset of action is typically rapid due to the rich vascular supply of the vaginal mucosa. Factors such as formulation, dosage, and individual patient characteristics can affect the pharmacokinetic profile.

Pregnancy

Vaginal medications should be used during pregnancy only if clearly needed. Consult healthcare provider for specific advice.

Breast-feeding

Consult healthcare provider before using vaginal medications while breastfeeding.

Storage

Store at room temperature, away from moisture and heat. Keep out of reach of children.

Mechanism of action

Clotrimazole acts primarily by damaging the permeability barrier in the cell membrane of fungi. Clotrimazole causes inhibition of ergosterol biosynthesis, an essential constituent of fungal cell membranes. If ergosterol synthesis is either completely or partially inhibited, the cell is no longer able to construct an intact and functional cell membrane,. Because ergosterol directly promotes the growth of fungal cells in a hormone‐like fashion, rapid onset of the above events leads to dose-dependent inhibition of fungal growth. Though decreased ergosterol, due to the inhibition of lanosterol 14-demethylase (also known as _CYP51_) is accepted to be primarily responsible for the antimycotic properties of clotrimazole, this drug also shows other pharmacological effects. These include the inhibition of sarcoplasmic reticulum Ca2+‐ATPase, depletion of intracellular calcium, and blocking of calcium‐dependent potassium channels and voltage‐dependent calcium channels. The action of clotrimazole on these targets accounts for other effects of this drug that are separate from its antimycotic activities. Clotrimazole exerts its antifungal activity by altering cell membrane permeability, apparently by binding with phospholipids in the fungal cell membrane. In contrast to polyene antibiotics (eg, amphotericin B), the action of clotrimazole is less dependent on the sterol content of the cell membrane. As a result of alteration of permeability, the cell membrane is unable to function as a selective barrier, and potassium and other cellular constituents are lost.

Pharmacodynamics

Clotrimazole is a broad-spectrum antifungal agent that inhibits the growth of pathogenic yeasts by changing the permeability of cell membranes. The action of clotrimazole is fungistatic at concentrations of drug up to 20 mcg/mL and may be fungicidal _in vitro_ against Candida albicans and other species of the genus Candida at higher concentrations. Unfortunately, resistance to clotrimazole, which was rare in the past, is now common in various patient populations. Clotrimazole is generally considered to be a fungistatic, and not a fungicidal drug, although this contrast is not absolute, as clotrimazole shows fungicidal properties at higher concentrations.