Nizacol (Miconazole)

Miconazole is used to treat fungal infections of the mucosal surfaces.

• Oral candidiasis (thrush): reduces fungal colonisation, alleviates soreness and promotes healing of oral lesions.
• Esophageal candidiasis: diminishes Candida overgrowth in the esophagus, improves dysphagia and supports mucosal recovery.
• Other mucosal fungal infections: treats Candida infections of the gastrointestinal or genitourinary mucosa, helping to clear symptoms and prevent spread.

• Miconazole inhibits fungal ergosterol synthesis by blocking the cytochrome P450 enzyme lanosterol 14α‑demethylase. This disruption prevents formation of the essential cell‑membrane sterol ergosterol, leading to increased membrane permeability, impaired cell growth and ultimately fungal cell death. The selective inhibition of the fungal enzyme over human enzymes provides antifungal activity with limited systemic toxicity.

Miconazole may cause adverse reactions, which are generally mild but can be serious in rare cases.

Common Side Effects

• Nausea: mild stomach upset.
• Headache: transient headache.
• Dyspepsia: indigestion or abdominal discomfort.
• Taste alteration: temporary change in taste perception.
• Local irritation: mild irritation of the oral mucosa.

Serious or Rare Side Effects

• Hepatotoxicity: signs of liver injury such as jaundice.
• Severe allergic reaction: rash, swelling, or anaphylaxis.
• Thrombocytopenia: low platelet count leading to easy bruising.
• Stevens‑Johnson syndrome: severe skin blistering.
• Cardiac arrhythmia: irregular heartbeat (very rare).

When prescribing or dispensing Nizacol, consider the following precautions to ensure safe use.

• Liver function: assess hepatic status before initiating therapy.
• Drug interactions: review concomitant medications that affect cytochrome P450 enzymes.
• Renal impairment: adjust use in patients with severe kidney dysfunction.
• Pregnancy: evaluate risk versus benefit; use only if clearly needed.
• Allergies: avoid in individuals with known hypersensitivity to imidazole antifungals.
• Store at ambient temperature: keep below 25 °C, in the original container, protected from moisture and light.

Miconazole can affect the metabolism of several drugs; interactions are categorized by clinical significance.

Major Interactions (Avoid)

• Warfarin: increased anticoagulant effect, risk of bleeding.
• Phenytoin: reduced clearance, potential toxicity.
• Rifampicin: decreased miconazole levels, loss of efficacy.

Moderate Interactions (Monitor Closely)

• Oral contraceptives: possible reduced effectiveness.
• Statins (e.g., simvastatin): increased plasma concentrations, risk of myopathy.
• Benzodiazepines (e.g., midazolam): enhanced sedative effect.