[Complications and their elimination during the rapid intravenous administration of rifampicin in an experiment].

Reaction to rapid intravenous administration (RIA) of rifampicin in a dose of 10 mg/kg was studied on 173 healthy dogs. Immediately after the first RIA of rifampicin there were observed vomiting and ataxia of various levels in 5.2 per cent of the animals. After the drug administration their arterial pressure (AP) lowered to 50-60 mm Hg. By the 9th-11th minute it restored to the initial level. A collapse-like condition was recorded immediately after rifampicin RIA in 2.3 per cent of the dogs with marked decreasing of their AP up to 15-20 mm Hg. Its restoration to the initial level was slow and required 35-40 min. It was noted that after the third consecutive RIA of rifampicin the observed reaction disappeared. Probably this was due to adaptation of the host to rifampicin intravenous injections. Mezaton is an efficient agent rapidly arresting the reaction within 1-3 min.