Imminent shock; a useful diagnosis in drug pathology.

A research has been carried out on a total of 121 persons with survival post-drug shock (DS), which registered 192 DS. Mention should be made of their predominance in the feminine sex (85 per cent) and their maximum frequency between the ages of 21-50 (average age 34). DS was the first adverse reaction to drugs in 71 per cent of the cases. Therefore DS unpredictability is very frequent. A retrospective study suggested the role of risk factors which should help the doctor to prevent DS (personal allergic antecedents, antecedents of adverse reactions to drugs, neuroses, disorders of endocrine glands, feminine sex, etc.). In 1970, the clinical concept of shock imminence (SI) was formulated and it is applied to various etiologies (drugs, insect stings, food). The existence of SI was identified in the case history of 14 per cent of the persons with DS. SI is a syndrome which includes all clinical manifestations with imminent potential of transformation into shock condition, and represents the stage precursory to the setting up of shock. The utility of SI diagnosis is maximum if it also includes the causal factor (e.g. SI by penicillin or aspirin). The clinical image of SI may vary from the monosymptomatic aspect (urticaria, vomiting, diarrhoea, headaches, etc.) to the one with complex symptomatology (mixed form). Usually the symptoms are dramatic and depend on the administration of a certain drug (often in SI of allergic origin) or of various drugs (mainly on non-immunologic form). The absence of vascular collapse differentiates SI from shock. Differential diagnosis is more difficult in border cases with a slight diminution of blood pressure. SI can be diagnosed especially in several circumstances: when the first adverse drug reaction is dramatic; when the first allergic-type reaction to a drug occurs; when the repetition of drug reactions is amplified in intensity or frequency; when it occurs in persons with risk factors. The differential diagnosis of SI is made with a crude or minimum shock and with pre-shock condition. The advantages of SI diagnosis are the institution of efficient treatment with rapid recoverability and the prevention of subsequent shock to the respective drug.