laxative



References: Laxative







J Formos Med Assoc. 1990 Oct;89(10):915-9, 913.
[Drug interaction between digoxin and bisacodyl]

[Article in Chinese]

Wang DJ, Chu KM, Chen JD, Tarn YH, Su DJ.

Department of Internal Medicine, Tri-Service General Hospital, Taipei, Taiwan, R.O.C.

Digoxin is one of the inotropic agents commonly used to improve cardiac performance in patients with congestive heart failure and to control ventricular response in atrial fibrillation and other supraventricular tachycardias. Bisacodyl (dulcolax), a stimulant laxative, is also commonly prescribed to prevent straining at stool or constipation in these patients. Therapeutic monitoring of digoxin is helpful in the evaluation of clinical response and intoxication of digoxin. For the convenience of serum level measurement, digoxin is usually administered at night before sleep to allow ample time for tissue distribution and then blood sampling the next morning. Concomitant use of these drugs may increase the likelihood of drug interaction. Eleven healthy volunteers, aged 22-26, were studied within 35 days accordingly in four phases. The serum digoxin concentration (SDC) in phase 2 (digoxin and bisacodyl together) showed a significant decrease as compared with phase 1 (digoxin alone) (0.58 +/- 0.03 vs. 0.66 +/- 0.03 ng/ml, M +/- SE, p less than 0.05). The percentage of SDC changes was down to -11.7 +/- 5.4%. Phase 4 (digoxin taken 2 hours before bisacodyl) showed an increase in SDC in comparison with phase 3 (digoxin alone) but was not statistically significant (0.65 +/- 0.03 vs. 0.62 +/- 0.03 ng/ml, M +/- SE, p greater than 0.05). The average frequency of diarrhea was 3.5 times in the first day of phase 2 and 2.7 times in the first day of phase 4. We conclude that in volunteers bisacodyl interacts with digoxin resulting in reduction of the SDC. Interference of the absorption is the most likely mechanism.(ABSTRACT TRUNCATED AT 250 WORDS)

Laxative online source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1981783&dopt=Abstract constipation laxative colon cleansing



Gut. 1996 Dec;39(96):863-6.
Incidence of persistent symptoms after laparoscopic cholecystectomy: a prospective study.

Luman W, Adams WH, Nixon SN, Mcintyre IM, Hamer-Hodges D, Wilson G, Palmer KR.

Gastrointestinal Unit, Western General Hospital, Edinburgh, Scotland.

BACKGROUND AND AIMS: Laparoscopic cholecystectomy is the standard treatment for symptomatic gall stone disease. This study aimed to assess the effect of the operation on patients' symptoms. METHODS: One hundred consecutive patients undergoing laparoscopic cholecystectomy between June 1994 and June 1995 were evaluated using standard questionnaires examining demographic details, indication for laparoscopic cholecystectomy, characteristics of pain, and other associated dyspeptic and colonic symptoms. A history of psychiatric disturbances and of hysterectomy were also recorded. The same questionnaires were administered again six months after the operation. Operation notes and histological reports were reviewed. RESULTS: Three patients were converted to open surgery and were excluded from analysis. The median age of the remaining 97 patients was 50.9 (19-85) years; 19 were men. There was one complication each of bleeding and biliary leak. Indications for laparoscopic cholecystectomy were biliary type pain (66 patients) and complicated gall stone disease (acute cholecystitis 21, cholestatic jaundice six, and pancreatitis four). Thirteen patients (13%) had persistent pain and two (3%) developed diarrhoea at follow up. Only one patient with persistent pain after laparoscopic cholecystectomy originated from the complicated gall stone disease group. Logistic discriminant analysis showed that bloating (p < 0.001), constipation (p < 0.05), and previous and current use of psychotrophic drugs (p < 0.001) were significantly more common among those with a poor outcome after laparoscopic cholecystectomy. Heartburn was unaffected. Of patients with persistent symptoms after cholecystectomy 77% had no or mild histological chang



Br J Surg. 1997 Feb;84(2):181-4.
Abnormalities in the contractile properties of colonic smooth muscle in idiopathic slow transit constipation.

Slater BJ, Varma JS, Gillespie JI.

Department of Surgery, Medical School, University of Newcastle upon Tyne, UK.

BACKGROUND: The underlying pathophysiology of idiopathic slow transit constipation (ISTC) remains unclear. At present, there is little evidence to implicate a smooth muscle myopathy in the aetiology of this condition. This study compared the effect of cisapride on the cholinergic response of colonic muscle strips from patients with this condition with that of control tissue. METHODS: Isometric tension production was recorded from circular smooth muscle strips taken from five patients undergoing colectomy for ISTC in response to cumulative concentrations of carbachol (100 nmol/1-100 mumol/l) alone and in the presence of cisapride 400 nmol/l. Similar dose-response activity was obtained for a control group consisting of six patients undergoing resection for colorectal carcinoma. RESULTS: In the absence of cisapride, smooth muscle from patients with carcinoma exhibited a significantly lower sensitivity to cholinergic stimulation (agonist concentration required to produce half-maximal activation (EC50) 4.83 mumol/l) than that from patients with ISTC (EC50 1.63 mumol/l, P = 0.036), and also a greater maximal frequency of the oscillatory activity associated with the increase in isometric tension (0.070 versus 0.049 Hz, P = 0.035). Cisapride had no effect on the sensitivity to carbachol of the carcinoma tissue but brought about a significant reduction in the sensitivity of smooth muscle from patients with ISTC (EC50 3.24 mumol/l, P = 0.043). CONCLUSION: These findings indicate that colonic smooth muscle from patients with ISTC is hypersensitive to cholinergic stimulation and suggest the existence of a smooth muscle myopathy in this condition.

Laxative online source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9052428&dopt=Abstract constipation laxative colon cleansing



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