According to the current guidelines the patient is not allowed to drink any fluid at least 2 hours after extubation to prevent complications. However there is no evidence in the literature to support this approach. Because anaesthetic drugs and their side effects changed significantly from their first usage, the investigators can assume that existing approach is obsolete and has no place anymore in the modern medicine. Keeping patient n.p.o (nothing per os) for 2 hours after extubation may lead to patient´s thirst or other discomfort. The aim of the study is to detect whether early oral fluid intake after extubation could lead to safe relief of thirst and to better patient´s comfort overall.

Everything stated in the brief summary.

Inclusion Criteria:

• patients with planned extubation assigned to the study
• able to swallow the fluid
• willing to participate the study

Exclusion Criteria:

• patients after upper digestive tract surgery
• patients after trachea surgery
• patients with possible neurological deficiency
• patients after VIII. cranial nerve surgery
• patients not able to swallow