Xozal

# Xozal ## Overview - **Classification**: Second-generation H1-receptor antagonist, antihistamine. - **Mechanism**: Selectively antagonizes peripheral H1-receptors, inhibiting histamine release and reducing allergic symptoms. ## Primary Indications 1. **Seasonal Allergic Rhinitis (SAR)** - Symptomatic relief of sneezing, rhinorrhea, nasal pruritus, ocular pruritus, tearing. 2. **Perennial Allergic Rhinitis (PAR)** - Symptomatic relief of chronic nasal allergy symptoms. 3. **Chronic Idiopathic Urticaria (CIU)** - Treatment of uncomplicated skin manifestations of chronic urticaria. ## Adult Dosing ### Standard Dosing **Seasonal/Perennial Allergic Rhinitis, Chronic Idiopathic Urticaria** - **Dose**: **5 mg** - **Frequency**: Once daily - **Route**: Oral (tablet or oral solution) - **Duration**: As needed for symptom control ### Dose Adjustments - **Renal Impairment**: Based on CrCl - CrCl 50-79 mL/min: **5 mg** every other day - CrCl 30-49 mL/min: **5 mg** twice weekly (every 3-4 days) - CrCl 10-29 mL/min: **5 mg** once weekly - CrCl <10 mL/min or Hemodialysis: **Contraindicated** - **Hepatic Impairment**: No dose adjustment is generally needed for hepatic impairment alone. - **Elderly Patients**: Monitor renal function; dose adjust as for renal impairment. ## Pediatric Dosing ### Neonates (0-28 days) - **Dose**: **Not recommended** - **Special Notes**: Contraindicated in infants <6 months of age due to potential for respiratory depression. ### Infants (1-12 months) - **Dose**: **Not recommended** for infants <6 months. - **Age 6 months to <12 months**: **1.25 mg** (2.5 mL oral solution) - **Frequency**: Once daily - **Maximum**: **1.25 mg/day** - **Special Notes**: Use oral solution for precise dosing in this age group. ### Children (1-12 years) **Age 1 to <6 years** - **Dose**: **1.25 mg** (2.5 mL oral solution) - **Frequency**: Once daily - **Maximum**: **1.25 mg/day** - **Formulation**: Oral solution preferred for ease of administration and accurate dosing. **Age 6 to 11 years** - **Dose**: **2.5 mg** (5 mL oral solution or half of a 5 mg tablet) - **Frequency**: Once daily - **Maximum**: **2.5 mg/day** - **Formulation**: Oral solution or scored tablet. ### Adolescents (13-18 years) - **Dose**: **5 mg** - **Frequency**: Once daily - **Maximum**: **5 mg/day** - **Special Notes**: Dosing similar to adults. ## Safety Information ### Contraindications - **Absolute**: Hypersensitivity to levocetirizine, cetirizine, or hydroxyzine. - **Absolute**: End-stage renal disease (CrCl <10 mL/min) or hemodialysis. - **Absolute**: Infants <6 months of age. ### Common Adverse Effects - **Common (1-10%)**: Somnolence, fatigue, dry mouth, nasopharyngitis, headache. - **Serious but Rare**: Hypersensitivity reactions (anaphylaxis), angioedema, seizures, urinary retention. ### Key Drug Interactions - **CNS Depressants (e.g., alcohol, sedatives)**: Increased CNS depression (drowsiness, impaired performance). Avoid concurrent use or use with caution. - **Ritonavir**: May increase levocetirizine exposure and prolong its effect. Monitor for increased adverse effects. ## Monitoring & Follow-up - **Before Treatment**: Assess renal function, especially in elderly or patients with known impairment. - **During Treatment**: Monitor for symptom improvement and adverse effects (e.g., drowsiness, dry mouth). - **Clinical Signs**: Watch for signs of excessive sedation, dizziness, or urinary retention. ## Clinical Pearls - 💡 **Timing**: Can be taken with or without food. Taking it in the evening may help mitigate daytime drowsiness. - 💡 **Sedation**: While less sedating than first-generation antihistamines, it can still cause drowsiness. Counsel patients to avoid driving or operating machinery until they know how it affects them. - 💡 **Renal Function**: Crucial to adjust dose in renal impairment to prevent accumulation and increased side effects. - 💡 **Pediatric Safety**: Strictly adhere to age-based dosing and avoid use in infants <6 months. > **⚠️ Important**: This information is for educational purposes only. Always consult current prescribing information, local guidelines, and clinical judgment before prescribing.