According to Patient.co.uk, a colonoscopy is a test conducted by a gastroenterologist to assess the colon for abnormalities such as colon cancer, tumors, polyps, ulceration and areas of bleeding and inflammation. Sedatives such as Versed and Demerol are normally given to patients so as to reduce pain and cause relaxation during colonoscopy. Sedatives may cause life-threatening side effects in patients.
Breathing Problems
According to the American Society of Gastrointestinal Endoscopy, or ASGE, sedatives used during colonoscopy depress respiratory system, leading to slowed breathing. Patients undergoing colonoscopy are closely monitored by the doctor to avoid severe depression of breathing. Patients are usually offered supplemental oxygen during colonoscopy so as to ensure adequate oxygenation. Large doses of sedatives may cause some patient to stop breathing. Normal doses of sedatives used during colonoscopy may also cause death in patients with previous histories of lung problems such as asthma and COPD. Patients should make sure they inform the doctor of previous medical histories that may warrant special attention during colonoscopy.
Low Blood Pressure
The ASGE states that sedative drugs used during colonoscopy may cause decreased blood pressure. Decreased blood pressure may be life-threatening because less oxygenated blood is supplied to the body. Patients with extremely low blood pressure may suffer from heart attack and die during colonoscopy procedure. Blood pressure and heart rate are closely monitored during colonoscopy to avoid complications.
Hypersensitivity
According to ASGE, some patients may be allergic to medications used to sedate patients during colonoscopy. Patients should inform the doctor of any known drug allergy before a colonoscopy is conducted. Signs and symptoms of severe allergic reactions to sedatives include difficulties breathing, wheezing, chest tightness, hives, rash and swelling of the tongue, face and lips.
Drowsiness and Impaired Reflexes
According to Patient.co.uk, sedatives administered during colonoscopy cause drowsiness, uncoordinated movements and impaired reflexes. Patients should avoid driving, operating machinery and drinking alcohol for 24 hours after having a sedative in order to avoid complications.
