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  • Title: A modified prescription-event monitoring study to assess the introduction of Flixotide Evohaler into general practice in England: an example of pharmacovigilance planning and risk monitoring.
    Author: Perrio MJ, Wilton LV, Shakir SA.
    Journal: Pharmacoepidemiol Drug Saf; 2007 Sep; 16(9):969-78. PubMed ID: 17476703.
    Abstract:
    INTRODUCTION: A modified prescription-event monitoring (PEM) study was conducted to examine the safety of the introduction of the metered dose inhaler (MDI) Flixotide Evohaler (fluticasone with the propellant HFA 134a). METHODS: Patients were identified from the first NHS prescriptions dispensed in England for Flixotide Evohaler. Postal questionnaires were sent to the prescribing doctor, requesting information including: demographic characteristics, severity of indication, concomitant medication, event data 3 months prior to and 3 months after the first prescription, and any reasons for stopping Flixotide. Pregnancies, deaths and selected events were followed up. Incidence density ratios (IDRs) were calculated to compare event rates 3 months before and 3 months after the introduction of Flixotide Evohaler. RESULTS: The cohort comprised 13 413 patients that were prescribed Flixotide Evohaler. The response rate was 64.0%. When the pre- and post-exposure periods were compared fewer patients had events in the post-exposure period, and there was no significant difference in the length of courses of oral steroid use. Eighteen patients experienced an event within 1 hour of using Flixotide Evohaler; these were minor with the exception of one case of angioneurotic facial oedema. Six of these events were assessed as possibly related to Flixotide Evohaler. During the study period there were an additional 13 patients with events assessed as possibly related to Flixotide Evohaler, including two reports of allergic reactions. DISCUSSION: The results suggest that the transition to Flixotide Evohaler was generally well tolerated. The modified methodology has contributed to the risk management of the introduction of this product.
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