Mizollen (Mizolastine)

Mizollen is a second‑generation H1 antihistamine indicated for allergic conditions affecting the upper airway and skin.

• Allergic rhinitis: reduces nasal congestion, sneezing, and rhinorrhea.
• Seasonal allergic rhinitis: alleviates symptoms triggered by pollen or other seasonal allergens.
• Chronic idiopathic urticaria: helps control itching and hives associated with chronic hives.

• Mizolastine selectively blocks peripheral H1 histamine receptors, preventing histamine from binding and activating the cascade that leads to vasodilation, increased vascular permeability, and sensory nerve stimulation. By inhibiting this pathway, the drug reduces the classic signs of allergic reactions without readily crossing the blood‑brain barrier, limiting central sedation.

Mizollen may cause a range of adverse reactions, most of which are mild and reversible.

Common Side Effects

• Headache: mild to moderate intensity.
• Dry mouth: sensation of reduced salivation.
• Fatigue: feeling of tiredness without exertion.
• Nausea: occasional upset stomach.
• Dizziness: transient light‑headedness.
• Abdominal discomfort: mild stomach pain.

Serious or Rare Side Effects

• Anaphylaxis: severe allergic reaction requiring immediate medical attention.
• Cardiac arrhythmia: irregular heart rhythm reported rarely.
• Hepatotoxicity: signs of liver injury such as jaundice.
• Severe skin reactions: Stevens‑Johnson syndrome or toxic epidermal necrolysis.
• Hematologic abnormalities: unexplained bruising or low blood counts.
• Persistent dizziness or syncope: fainting episodes.

Before using Mizollen, consider the following safety measures.

• Pregnancy: consult a healthcare professional; safety data are limited.
• Breastfeeding: discuss potential infant exposure with a physician.
• Liver impairment: dose adjustment may be required in hepatic dysfunction.
• Renal impairment: monitor renal function; adjust dose if necessary.
• Driving or machinery: avoid activities requiring alertness if dizziness occurs.
• Store at ambient temperature: keep below 25 °C, retain in original packaging, protect from moisture and direct sunlight.

Mizollen can interact with other medicines; awareness of the interaction level helps manage risk.

Major Interactions (Avoid)

• Strong CYP3A4 inhibitors (e.g., ketoconazole, clarithromycin): may increase mizolastine plasma concentrations.
• Other H1 antihistamines: additive sedation or anticholinergic effects.
• Monoamine oxidase inhibitors (MAOIs): risk of heightened antihistaminic effects.

Moderate Interactions (Monitor Closely):\n- Alcohol: may enhance drowsiness.

• CNS depressants (e.g., benzodiazepines): monitor for increased sedation.
• Anticholinergic drugs: watch for amplified dry‑mouth or constipation.