title: [Clinical efficacy of arbidol (umifenovir) in the therapy of influenza in adults: preliminary results of the multicenter double-blind randomized placebo-controlled study ARBITR].
abstract: OBJECTIVE
  To evaluate the efficacy and safety of Arbidol (umifenovir) in adult patients with influenza.
  
  
  METHODS
  The analysis of the preliminary results of the multicenter double-blind randomized placebo-controlled post-marketing study ARBITR was performed. A total of 293 adults aged 18 to 65 years with influenza or acute respiratory tract infection of no more than 36 hours' duration were enrolled in the study. Individuals were randomized into 2 treatment groups: oral umifenovir 200 mg four times daily for 5 days or placebo four times daily for 5 days. The efficacy endpoints were time to resolution of all symptoms, severity of symptoms and illness, durations of virus shedding.
  
  
  RESULTS
  The efficacy of umifenovir was evaluated in the group of 119 (40.6%) patients with influenza: 45 patients with laboratory-confirmed influenza and 74 patients whom diagnosis of influenza was made based on clinical and epidemiological data. Umifenovir had influence on the time to resolution of all symptoms. All symptoms were resolved within the first 60 hours after therapy initiation in 23.8% patients with laboratory-confirmed influenza in the umifenovir group and it was 5.7 times greater compared to placebo group (4.2%) (p < 0.05). Severity of illness, catarrhal symptoms and intoxication was reduced with umifenovir compared to placebo, reducing of severity was most evidently observed within the first 2-3 days following the therapy initiation. Umifenovir had a significant effect on viral shedding. The proportion of patients still shedding influenza virus on day 4 was significantly reduced in the umifenovir group compared to placebo (25 vs 53%, respectively; p < 0.05).
  
  
  CONCLUSIONS
  It was found that the effect of umifenovir in the treatment of influenza in adults is most pronounced in the acute stage of the disease and appears in the reduction of time to resolution of all symptoms of the disease, reducing the severity of symptoms of the disease and durations of virus shedding.
authors.affiliation: Research Institute of Influenza, Ministry of Health of Russia, Saint-Petersburg, Russia.
authors.forename: O I
authors.initials: OI
authors.lastname: Kiselev
authors.affiliation: Central Research Institute of Epidemiology, Russian Federal Service for Supervision of Consumer Rights Protection and Human Welfare, Moscow, Russia.
authors.forename: V V
authors.initials: VV
authors.lastname: Maleev
authors.affiliation: Research Institute of Influenza, Ministry of Health of Russia, Saint-Petersburg, Russia.
authors.forename: E G
authors.initials: EG
authors.lastname: Deeva
authors.affiliation: I.I. Mechnikov Research Institute of Vaccines and Sera, Russian Academy of Medical Sciences, Moscow, Russia.
authors.forename: I A
authors.initials: IA
authors.lastname: Leneva
authors.affiliation: G.N. Gabrichevsky Moscow Research Institute of Epidemiology and Microbiology, Russian Federal Service for Supervision of Consumer Rights Protection and Human Welfare, Moscow, Russia.
authors.forename: E P
authors.initials: EP
authors.lastname: Selkova
authors.affiliation: JSC 'OTCpharm', Moscow, Russia.
authors.forename: E A
authors.initials: EA
authors.lastname: Osipova
authors.affiliation: JSC 'Pharmstandart', Dolgoprudnyi, Moscow Region, Russia.
authors.forename: A A
authors.initials: AA
authors.lastname: Obukhov
authors.affiliation: JSC 'Pharmstandart', Dolgoprudnyi, Moscow Region, Russia.
authors.forename: S A
authors.initials: SA
authors.lastname: Nadorov
authors.affiliation: JSC 'Pharmstandart', Dolgoprudnyi, Moscow Region, Russia.
authors.forename: E V
authors.initials: EV
authors.lastname: Kulikova
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000998:Antiviral Agents / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D003139:Common Cold / Q000188:drug therapy* / Q000821:virology; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D007211:Indoles / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D007251:Influenza, Human / Q000188:drug therapy* / Q000821:virology; D008297:Male; D008875:Middle Aged; D012367:RNA, Viral / Q000097:blood; D012426:Russia; D012720:Severity of Illness Index; D016896:Treatment Outcome; D055815:Young Adult; D013440:Sulfides
chemical_list: D000998:Antiviral Agents; D007211:Indoles; D012367:RNA, Viral; C086979:umifenovir; D013440:Sulfides