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Availability of Immune Globulin Intravenous for Treatment of Immune Deficient Patients -- United States, 1997-1998.

Immune globulin intravenous (IGIV) is a lifesaving treatment for patients with primary immunodeficiency. Since November 1997, a shortage of IGIV has existed in the United States. In 1998, the Food and Drug Administration (FDA) required pharmaceutical companies to increase the frequency of reporting on IGIV distribution from biannually to monthly; in addition, FDA facilitated IGIV distribution and informed clinicians about the ongoing shortage. To assess the impact of the IGIV shortage on patient care, in 1998 the Immune Deficiency Foundation (IDF) surveyed physicians caring for immunodeficient patients about whether they have had difficulty obtaining IGIV, measures they have taken because of the shortage, and the effect of the shortage on their patients. This report summarizes data reported to FDA and data obtained from the IDF survey and provides recommendations for IGIV use during the shortage.

Reporting to FDA

Based on industry reports of IGIV distribution from all seven pharmaceutical companies handling IGIV during 1995-1998, the FDA estimated shortfall of IGIV compared with demand was 20% for 1997 and 30% for 1998. For 1997, FDA attributed approximately 60% of the decreased availability to production Impediments related to compliance and approximately 20% to withdrawals of plasma products because of the theoretical risk for contamination with the Creutzfeldt-Jakob disease (CJD) agent. The remainder of the shortage was attributed to other problems, including increased use, wastage, and export of IGIV.

To address the shortage, on January 28, 1998, FDA sent a letter to physicians reminding them of the six approved uses for IGIV (Table 1) and recommended that priority for IGIV be given to patients who have FDA-approved indications for use. In addition, a review of data from FDA, NIH, and CDC suggested that the risk for transmission of classic CJD by blood products, if it exists, is considerably lower than the risk for harm to public health from CJD-related quarantines and withdrawals. Therefore, on August 27, 1998, the Surgeon General recommended that plasma derivatives, including IGIV, be withdrawn only if the blood donor developed new-variant CJD.

IDF Survey

In March 1998, IDF conducted a survey using its database of 1567 self-identified physicians who treat immunodeficient patients in 42 states; the physicians reported concurrently treating 23,341 primary immunodeficient patients. Of the physicians, each of 221 reported having treated 25 immunodeficient patients concurrently, accounting for 15,044 (64%) of primary immunodeficient patients in the survey. The survey, which inquired specifically about IGIV use and the effects of the shortage on immunodeficient patients during the previous 6 months, was sent to the 221 physicians and to a random sample of 265 of the physicians treating <25 immunodeficient patients concurrently. Responses were received from 151 (68%) of the 221 physicians treating 25 immunodeficient patients and from 117 (44%) of the 265 physicians treating <25 immunodeficient patients. Of the 268 (55%) who responded, 215 (80%) reported treating immunodeficient patients using IGIV. Most (184 [86%]) reported difficulty obtaining IGIV. Altered dosage schedules because of the shortage were reported: postponed IGIV infusions, 148 (69%); increased interval between IGIV infusions, 120 (56%); decreased IGIV dosages, 82 (38%); and substitution of alternative therapy to IGIV, 39 (18%). The shortage adversely affected patients of 97 (45%) respondents; adverse effects reported by respondents included increased infections, stress, anxiety, and malaise.

Reported by: M O'Day, J Boyle, PhD, TL Moran, J Winkelstein, MD, Immune Deficiency Foundation, Towson, Maryland. Div of Hematology, Office of Blood Research and Review, Center for Biologics Evaluation and Research, Food and Drug Administration. Div of Viral and Rickettsial Diseases and Hospital Infections Program, National Center for Infectious Diseases; and an EIS Officer, CDC.

Editorial Note: During the early 1980s, IGIV was developed as an infusion product that did not have large immunoglobulin aggregates and that allowed immunodeficient patients to receive enough immune globulin at monthly intervals to protect them from infections until their next infusion. IGIV is recommended for a limited number of approved or proven purposes (1). In 1990, a National Institutes of Health (NIH) Consensus Development Conference recognized the usefulness of IGIV for chronic inflammatory demyelinating polyneuropathy (Table 1) (2). In 1995, the University Hospital Consortium Expert Panel for Off-Label Use of Polyvalent Intravenously Administered Immunoglobulin Preparations (UHC) stated its position regarding IGIV use for several diseases (Table 1).

Information reported to FDA suggests that distribution and production factors contributed to the IGIV shortage, leading to the problems for patients documented by the IDF survey. However, part of the shortage has resulted from increasing IGIV administration for both approved and unapproved uses. Despite FDA, NIH, and UHC attempts to guide clinicians, >50% of IGIV use is for purposes not approved by FDA (3). If IGIV were administered only for conditions for which its efficacy is supported by adequate scientific evidence and for which no other treatment exists, then more IGIV would become available for immunodeficient patients, whose physicians have had difficulty obtaining IGIV.

The FDA analysis of information on the shortage has at least three limitations. First, reports and shortage evaluations are based on passive reporting to the agency. Second, information on monthly IGIV production (in contrast to distribution) and demand is not available. Finally, FDA has minimal information on the export of IGIV.

The findings of the IDF survey are subject to at least four limitations. First, physicians surveyed were from a database of physicians who self-identified as treating immunodeficient patients, and they may not represent the practices of all physicians treating patients with IGIV. Second, the response rate for the survey was low. Third, because the survey specifically inquired about difficulty obtaining IGIV, physicians having problems obtaining IGIV may have been more likely to respond. Finally, although the findings of the IDF survey suggest that the IGIV shortage may be adversely affecting physician prescribing practices and patients' health, the survey design did not permit more precise estimation of possible adverse effects. These limitations may lead to overestimation of the severity of the shortage.

FDA is using several methods to improve IGIV distribution to patients, such as evaluating products manufactured in Europe for possible use in the United States, encouraging manufacturers to set aside emergency supplies of IGIV, continuing to monitor IGIV supplies and distribution, and shortening the lot-release time for IGIV. Long-term plans include reevaluating uses of plasma derivatives and expanding plasma product production capacity.

Clinicians should review their IGIV use to ensure consistency with current recommendations, and pharmacists should facilitate appropriate use by assisting in triage of available IGIV to high priority patients as outlined by FDA, NIH, and the UHC (Table 1). IDF, in cooperation with IGIV manufacturers, is distributing a limited supply of IGIV product on an emergency basis to clinical immunologists enrolled in the program. Additional. information about this program is available from IDF, telephone (800) 296-4433, Monday through Friday from 8 a.m. to 5 p.m.

References

1. Buckley RH, Schiff RI. The use of intravenous immune globulin in immunodeficiency diseases. N Engl J Med 1991;325:110-7.

2. National Institutes of Health Intravenous immunoglobulin: prevention and treatment of disease: NIH consensus statement. Washington, DC: US Department of Health and Human Services, National Institutes of Health, 1990;8:1-23.

3. Robert P. The fractions market in the United States. Orange, Connecticut: The Market Research Bureau, 1996.

Recommendations for use of immune globulin intravenous (IGIV), by
recommending source

               Agency recommendations
Acceptability  [FDA.sup.*]                          [NIH.sup.+]
Accepted       Primary immunodeficiencies;          FDA-accepted
               immune-mediated                      indications and
               thrombocytopenia; Kawasaki           chronic
               syndrome; recent bone marrow         inflammatory
               transplant in adults; chronic B-cell demyelinating
               lymphocytic leukemia; pediatric HIV  polyneuropathy
               infection
Equal to other
  therapy
May be useful










Not useful












Acceptability                          [UHC.sup.ss]
Accepted                               Post-transfusion purpura (FDA
                                       indications were not
                                       re-evaluated)





Equal to other                         Guillain-Barre syndrome and chronic
                                       inflammatory
  therapy                              demyelinating polyneuropathy
May be useful                          Anemia because of parvovirus B19;
                                       patients with stable
                                       multiple myeloma who are at high risk
                                       for recurrent infection;
                                       cytomegalovirus (CMV)-negative
                                       recipients of CMV-positive
                                       organs; hypogammaglobulinemic neonates
                                       with risk factor for
                                       infection or morbidity; intractable
                                       epilepsy; systemic vasculitic
                                       syndromes; warm-type autoimmune
                                       hemolytic anemia;
                                       neonatal alloimmune thrombocytopenia
                                       when unresponsive
                                       to other treatments; immune-mediated
                                       neutropenia;
                                       decompensation in myasthenia gravis;
                                       dermatomyositis;
                                       polymyositis; thrombocytopenia when
                                       severe and
                                       unresponsive to other treatments
Not useful                             Acute lymphoblastic leukemia; acute
                                       renal failure;
                                       adrenoleukodystrophy; adult HIV
                                       infection; anemia not
                                       otherwise specified (NOS); asthma;
                                       bleeding disorders;
                                       neurologic disease or thrombocytopenia
                                       if NOS; Behcet's
                                       syndrome; chronic fatigue syndrome;
                                       congenital heart block;
                                       cystic fibrosis; diabetes mellitus;
                                       endotoxemia; euthyroid
                                       ophthalmopathy; inclusion body
                                       myositis; membraneous
                                       nephropathy; nephrotic syndrome;
                                       prophylaxis for solid organ
                                       transplantation, surgery, or trauma;
                                       recurrent otitis media;
                                       recurrent spontaneous abortion;
                                       rheumatoid arthritis


(*.)Food and Drug Administration. Different IGIV products may be approved
for different indications.
(+.)National Institutes of Health Consensus Development Conference.
(ss.)University Hospital Consortium Expert Panel for Off-Label Use of
Polyvalent Intravenously Administered Immunoglobulin.
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Publication:Morbidity and Mortality Weekly Report
Geographic Code:1USA
Date:Mar 5, 1999
Words:1441
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