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EXPERIENCE IN THE PHARMACEUTICAL FORMULATION OF IMIQUIMOD SUPPOSITORIES FOR THE TREATMENT OF ANAL CONDYLOMATOSIS: A CASE STUDY (submitted in 2019)

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European Statement

Production and Compounding

Author(s)

MARIA MUROS ORTEGA, INMACULADA SANCHEZ MARTINEZ, ARANTXA ANDUJAR MATEOS, ISABEL ALARCON FUENTES, FRANSCISCO VALIENTE BORREGO, ANGELA SANCHEZ , ASUNCION SARABIA, ANTONIA RODRIGUEZ, NURIA LUCAS VILLA

Why was it done?

Condylomata acuminata or genital warts are produced by human papillomavirus (HPV). They are considered one of the most common sexually transmitted diseases that must be treated on an individual basis. Imiquimod increases the local immune response mediated by interferon and other cytokines; it is marketed as a 5% cream for topical administration 3 times a week, for a maximum of 16 weeks.

What was done?

The aim of the study is to describe the formulation and results obtained after treatment with imiquimod suppositories manufactured by the Pharmacy Hospital Service.

How was it done?

Suppositories of imiquimod 6.25mg were prepared from Aldara® 5% cream sachets; stearic mass was used as excipient to convey the active principle adding about 2.2g/suppository and molds of 2g for its preparation. The bain-marie was used for fusion and mixing the components. A sterile gauze was included to facilitate extraction if there was anal irritation. The established shelf life was 6 months between 28ºC. Suppositories were dispensed individually wrapped in aluminium foil and protected from light added a diptych of information to the patient.

What has been achieved?

The case of a 33-year-old male, VHP 6 positive, with anal condylomatosis and high-grade epithelial dysplasia, most of which had been resected and burned previously without satisfactory results. Imiquimod was added as an adjuvant treatment in suppositories for administration three days a week at night. Twelve suppositories were dispensed each month, and the duration of treatment was 2 months. During treatment the patient reported good tolerance, no itching, no pain in the area of administration. One month after finishing the treatment, no new macroscopic lesions were observed, nor recurrence of previous ones in anoscopic examination.

What next?

The contribution of the Pharmacy Service through the development of imiquimod suppositories has facilitated the achievement of early health results in a complex treatment pathology, allowing rectal administration through suppositories made from a specialty marketed in envelopes for topical use and reducing the duration of treatment to 8 weeks, with very good tolerance on the part of the patient.
References:
1. Bastida C et al. Formulation of imiquimod suppositories for the treatment of intra-anal neoplasms by human papillomavirus. 57th SEFH Congress.
2. PNT elaboration of the Reina Sofía General University Hospital.
3. Lacey C et al. 2012 European guideline for the management of anogenital warts. J Eur Acad Dermatol Venereol 2013 Mar;27(3):e263-70.
4. AEPCC-Guide: Condylomata acuminata. AEPCC Publications, November 2015.

PUBLICATION OF THE FIRST TEXTS IN THE EUROPEAN PAEDIATRIC FORMULARY (submitted in 2019)

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European Statement

Production and Compounding

Author(s)

Jane Francomb, Dirk Leutner

Why was it done?

Formularies for extemporaneous formulations of paediatric medicines of appropriate quality are currently available in some regions or countries, but no pan-European equivalent exists. Some formulations in use are not appropriate due to a lack of knowledge of best practices. The idea behind the new formulary is to collect, review and then select the most appropriate formulations currently used in Europe which meet today’s requirements.

What was done?

The European Paediatric Formulary was launched at the end of 2019. It is a freely available online publication for pharmacists and clinicians that is intended to provide guidance on the use and preparation of standardised paediatric medicines of an appropriate quality when a suitable licensed medicinal product is not available. The first two monographs and two explanatory texts of the European Paediatric Formulary have now been published by the European Directorate for the Quality of Medicines & HealthCare (EDQM).

How was it done?

Criteria for selection and evaluation of formulations were developed by 2015. Since then the current work is carried out by the European Paediatric Formulary Working Party under the supervision of the European Pharmacopoeia Commission and the European Committee on Pharmaceuticals and Pharmaceutical Care (CD-P-PH). The EDQM provides the scientific secretariat. Monographs for development were prioritised based on patient need. Many formulations currently described in national formularies and other well-established formulations have been gathered from stakeholders throughout Europe. The information available for the most appropriate formulation was transferred into a common format with full quantitative composition details, extemporaneous preparation instructions, validated test methods for quality control and storage conditions.

What has been achieved?

Monographs for hydrochlorothiazide 0.5mg/mL oral solution and sotalol hydrochloride 20mg/mL oral solution were published at the end of 2019. These were accompanied by an introduction and general principles which describe the purpose and content of the European Paediatric Formulary.

What next?

Monographs for Azathioprine oral suspension, Chloral hydrate oral solution, Furosemide oral solution, Isoniazid oral solution, Omeprazole oral suspension and Ranitidine oral solution and a monograph on an oral vehicle are currently under development. Further prioritised items will subsequently be added. Draft monographs for public consultation and final texts will be made available on https://paedform.edqm.eu.

PRODUCT DOSSIER AND RISK EVALUATION FOR EXTEMPORANEOUS PREPARATIONS KEEPS FOCUS ON PATIENTS (submitted in 2019)

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European Statement

Production and Compounding

Author(s)

Mette Lethan, Marianne Lund Sørensen, Jakob Kronkvist Hoe, Heidi Waenerlund Poulsen, Louise Rasmussen Duckert

Why was it done?

On July 1st, 2016, an EU resolution caused a new national requirement to establish a PD for new as well as known EP’s produced by the hospital pharmacy. PD’s had to be established for 450 known products in our facilities.

What was done?

A Product Dossier (PD) for extemporaneous preparations (EP) was established in our hospital pharmacy. They contain a risk evaluation and information about the specific value of the preparations, a demonstration that the active pharmaceutical ingredient(s) (API), excipients and containers meet relevant requirements, an evaluation of the stability of the product, and a description of the preparation process and analysis.

How was it done?

To approach the task, an interdisciplinary project group was formed. It consisted of members from Quality Assurance/Control, Stability, Drug Information Center and Production. A formulation for a collaborative approach was established to ensure a high and uniform quality of the PDs. The information obtained included e.g. information and evaluation of API and excipients, ongoing stability studies, indication of the drug and alternative preparations. A few examples were concluded in the group to ensure a quality baseline of the PDs.

What has been achieved?

PDs for 150 products have been successfully implemented. In some cases the formulation regarding excipients was changed to better suit the patient group. In other cases, it was evaluated whether a drug registered in another country could better ensure patient safety. Based on stability data, storing of some products were changed. Collaboration across departments has enabled us to ensure compilations of PDs for our pharmaceutical stock preparations. Completing the PDs on existing products has ensured a pool of knowledge about our products collected in one document and accessible to all departments in the hospital pharmacy.

What next?

Through the interdisciplinary approach PDs ensure focus on the quality, safety and benefits for the patients. All existing EPs will be maintained and evaluated anytime there may be a change in production. For all new products a PD will be prepared according to the guidelines set up. Having the information in one document (PD) ensures that all departments can quickly obtain information needed to consistently maintain and evaluate product quality and thereby the specific value of our production.

DIAZOXIDE 10MG/ML ORAL SUSPENSION AS A COST-EFFECTIVE ALTERNATIVE TO THE COMMERCIAL PREPARATION (submitted in 2019)

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European Statement

Production and Compounding

Author(s)

Beatriz Sánchez Sanz, Iván González Barrios, Siria Pablos Bravo, Sara Ortiz Pérez, Cristian Rosas Espinoza, María Arrieta Loitegui, Francisco Martínez de La Torre, Dolores Canales Sigero, José Miguel Ferrari Piquero

Why was it done?

The objective is the elaboration of a formulation as a cost-effective alternative to the diazoxide oral suspension not commercialised in Spain, to treat patients with hyperinsulinaemic hypoglycaemia.

What was done?

Diazoxide is the first line therapy in infants with hypoglycaemia due to hyperinsulinism. A formulation to facilitate the dosage in newborns has been developed due to the increasing demand at our Hospital.

How was it done?

To evaluate the solubility, a research on Pubmed was executed including terms such as “diazoxide AND solubility” and “tiazides AND solubility”. To determine the stability, the agreement approved by the “Pharmacotechnics Group of the Spanish Society of Hospital Pharmacy” concerning the viability of the non-sterile oral formulations was reviewed. In terms of effectiveness, a retrospective observational study was conducted. Demographic and clinical (duration of the therapy and blood sugar levels 24 hours after first administration, sorted as “sensitive” if those levels were over 60mg/dL) variables were collected.

What has been achieved?

Carboxymethyl cellulose gel 1.5% (CMC) was evaluated as suspending agent, with adequate results. The steps to compounding the formulation of diazoxide 10mg/mL oral suspension were: 1. Four capsules of 25mg were opened and spread over a mortar. 2. 10ml of CMC was measured on a test tube. 3. CMC was added slowly over the powder while stirring the mixture to obtain a homogenized milky creamy. 4. Suspension was stored in an amber bottle. Following our stabilities studies and the lack of preservatives, an expiration date of seven days at ambient temperature was assigned. In our hospital, seven neonates (four males) aged 5.8±2.3 days have been treated with this oral suspension, for an average period of 28 days. Six of them were classified as “sensitive” with levels of 105±30mg/dL while one showed no improvement. Analysing the global expense, one pack of 100 capsules costs €21. Thus, 1 unit of our suspension 10mL cost €0.84 versus 1 bottle of 30mL (€473); the savings are remarkable.

What next?

The preparation constitutes a suitable alternative by using a simple and cheap technique since its introduction. In the future, full studies of stability must be designed to prolong its period of validity and monitor its security.

IMPROVING THE CONTINUITY OF CARE IN CASE OF EXTRATEMPORANEOUS MEDICINES FOR CHILDREN

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European Statement

Clinical Pharmacy Services

Author(s)

Stefanie Sauer, Michael Ober, Jürgen Backhaus, Torsten Hoppe-Tichy

Why was it done?

Patients of the Children’s Hospital at the Heidelberg University Hospital are regularly supplied with extratemporaneous medicines from the hospital pharmacy. This often leads to issues in continuity of care in the outpatient setting as patients are required to access ongoing treatment through local pharmacies, which in turn must develop the formulations and procure the necessary raw materials. Therefore, it is not uncommon for interruptions in patients’ therapy to occur.

What was done?

The aim was to improve continuity of care by discussing the medication with the responsible pharmacy before the patient was discharged. Allowing missing raw materials to be procured and clarify any uncertainty about the prescription.

How was it done?

We designed a document that is available on the Intranet. While the child is still on the ward the discharge medication should be noted. The parents had the opportunity to indicate a retail pharmacy of their choice, preferably near the place of residence. This document could be sent to the hospital pharmacy. A hospital pharmacist contacted the specified pharmacy to discuss the extemporaneous medications before the child was discharged. If necessary, the pharmacist can forward the hospital pharmacy manufacturing instructions. Furthermore, the compositions plus further information were then made available on the homepage of the pharmacy in an area to which only experts have access. A telephone number on the hospital pharmacy homepage is available for queries, including those about the formulations.

What has been achieved?

In the discussions with the retail pharmacies, the colleagues were very pleased and grateful about the service provided by the hospital pharmacy. They saved time in preparing patients’ prescriptions. Concerns or doubts were cleared up at an earlier stage of the discharge process, leading to the patient receiving their medicine on time.

What next?

Provision of the document and manufacturing instructions on the homepage serve as a valuable aid for ensuring that the outpatient therapy functions smoothly. It is important that the information is kept current. In the future, further information will be linked to the homepage in the hope of reducing the number of incoming telephone enquiries.