PMID- 22973372 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20121002 LR - 20211021 IS - 1735-7136 (Electronic) IS - 1735-1995 (Print) IS - 1735-1995 (Linking) VI - 16 IP - 12 DP - 2011 Dec TI - Rapid exacerbation of multiple sclerosis following the initiation of interferon-beta: report of nine cases. PG - 1619-22 AB - BACKGROUND: Interferon-beta (IFN-beta) is an effective drug in multiple sclerosis (MS) but it may cause acute exacerbation of MS following the initiation of treatment. This study evaluated patients with rapid exacerbation of multiple sclerosis (REMS) following the initiation of IFN-beta. METHODS: We retrospectively reviewed the clinical records of 2350 patients with multiple sclerosis who started treatment with IFN-beta and were registered with Isfahan MS Society (IMSS). Patients with rapid exacerbation of multiple sclerosis within 24 hours after initiation of IFN-beta treatment were selected and their demographic and clinical data were extracted. RESULTS: We identified nine patients with rapid exacerbation of multiple sclerosis following the initiation of IFN-beta. Their mean age at the time of treatment with IFN-beta was 37.3 +/- 6.28 years. Seven patients had rapid exacerbation of multiple sclerosis after initiation of IFN-beta 1a and two patients after IFN-beta 1b. The course of disease in all of these patients was relapsing-remitting. However, all had converted into secondary progression within the first year after occurrence of rapid exacerbation of multiple sclerosis following the initiation of IFN-beta. CONCLUSIONS: This study may indicate that the effects of IFN-beta are not purely anti-inflammatory and a small percentage of MS patients experience rapid exacerbation of multiple sclerosis following the initiation of IFN-beta. Future studies are needed to validate our findings. FAU - Etemadifar, Masoud AU - Etemadifar M AD - Professor, Department of Neurology, Isfahan University of Medical Sciences, Isfahan, Iran. FAU - Sarrami, Amir Hossein AU - Sarrami AH LA - eng PT - Journal Article PL - India TA - J Res Med Sci JT - Journal of research in medical sciences : the official journal of Isfahan University of Medical Sciences JID - 101235599 PMC - PMC3434905 OTO - NOTNLM OT - Central Nervous System OT - Interferon-beta OT - Multiple Sclerosis OT - Rapid Exacerbation COIS- Conflict of Interests Authors have no conflict of interests. EDAT- 2012/09/14 06:00 MHDA- 2012/09/14 06:01 PMCR- 2011/12/01 CRDT- 2012/09/14 06:00 PHST- 2011/09/29 00:00 [received] PHST- 2011/12/05 00:00 [accepted] PHST- 2012/09/14 06:00 [entrez] PHST- 2012/09/14 06:00 [pubmed] PHST- 2012/09/14 06:01 [medline] PHST- 2011/12/01 00:00 [pmc-release] AID - JRMS-16-1619 [pii] PST - ppublish SO - J Res Med Sci. 2011 Dec;16(12):1619-22.