Going Through Surgery is Hard Enough Already
Don't Add Caffeine Withdrawal to the List of Problems

Many patients that have done well from the surgery suffer severe headaches that may well be caused by caffeine withdrawal.

Stop caffeine consumption well before you have the operation.

Anesth Analg 1991 Apr;72(4):449-53

Is caffeine withdrawal the mechanism of postoperative headache?

Fennelly M, Galletly DC, Purdie GI

Department of Anaesthesia, Royal Postgraduate Medical School, Hammersmith Hospital, London, England.

This study examined the hypothesis that headache after general anesthesia is related to a caffeine withdrawal state. Two hundred eighty-seven patients undergoing minor elective procedures under general anesthesia were studied. Four to six hours after anesthesia each patient completed a questionnaire assessing his or her own alcohol, tobacco, and caffeine consumption, and the occurrence of postoperative side effects. A highly significant difference was found between the caffeine consumption of patients with and without preoperative (P = 0.0035) and postoperative (P less than 0.0001) headache. Logistic regression analysis of trend between headache and caffeine consumption suggested that with each 100-mg increase in caffeine consumption, there was a 12% increase in the odds of headache developing in the immediate preoperative period (P less than 0.0066) and a 16% increase in the odds of postoperative headache developing (P less than 0.0001). No relationship was found between headache and the patients' age, sex, usual frequency of headache, consumption of alcohol or nicotine, or the anesthetic agents or adjuvants used. It is concluded that postoperative headache is related to caffeine intake and that this relationship is explained, at least in part, by a perioperative caffeine withdrawal syndrome.

Mayo Clin Proc 1993 Sep;68(9):842-5

Perioperative ingestion of caffeine and postoperative headache.

Weber JG, Ereth MH, Danielson DR

Department of Anesthesiology, Mayo Clinic Rochester, Minnesota 55905.

The interruption of daily consumption of caffeine-containing beverages can cause headache and other symptoms within 8 hours. Resumption of caffeine alleviates these symptoms. Surgical patients routinely fast preoperatively and may have postoperative symptoms from caffeine withdrawal. In the current study, we determined whether perioperative caffeine consumption altered the incidence of postoperative headache. After institutional approval of the study design, 233 surgical outpatients were surveyed about history of headaches, caffeine consumption, and the presence and severity of headaches postoperatively. Of the 233 patients, 190 (82%) drank caffeinated beverages daily (mean daily consumption, 290 mg of caffeine). Postoperative headaches occurred in 22% of patients who routinely drank caffeinated beverages but in only 7% of those who did not (P < 0.03). Other factors associated with postoperative headaches included a history of frequent headaches (P < 0.0001), age of 50 years or younger (P < 0.002), and amount of daily caffeine ingested (P < 0.01). Among daily caffeine drinkers, those who drank caffeinated beverages on the day of the surgical procedure had a lower incidence of postoperative headaches than did those who abstained (17% versus 28%; P < 0.04). Postoperative headaches may be related to several factors. Perioperative intake of caffeine altered postoperative well-being. Caffeine given preoperatively may limit postoperative withdrawal headaches among the millions of daily drinkers of caffeinated beverages. A randomized, prospective, and blinded trial to test this hypothesis is warranted.

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Warning: Gastric Bypass Surgery is a MAJOR surgical procedure. It can be associated with significant risks and complications, up to and including death. Weight loss surgery is a rapidly developing area of medicine. Bariatric surgery is filled with controversy. It is very important to take a careful and deliberate approach to considering surgery for the treatment of obesity.  

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