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Are anthranoid laxatives effective in chronic constipation?

A double-blind randomised placebo-controlled study

  • Original Research
  • Published:
Nutrafoods

Abstract

Constipation is the most common digestive complaint in the general population. Anthranoid laxatives are easily available, not expensive and are among the most sold drugs, but no randomized placebo-controlled studies have been performed to assess their effectiveness and safety in patients with chronic constipation.

Methods/Aims

Aim of this study was to evaluate the effect of once-daily administration of an infusion prepared using a commercially available mixture of herbs containing anthranoid laxatives (HAM: herbal anthranoid mixture) taken in the evening before bedtime for 10 days in patients with chronic constipation. We conducted a double-blind randomized placebo-controlled cross-over study, on patients with chronic constipation according with the Roma III criteria. The patients were randomly divided (1:1) into two arms, according to a cross-over protocol. Arm A received a 10 days treatment (HAM), no therapy for 10 days and placebo for other 10 days. Arm B received placebo for 10 days, no therapy for 10 days and HAM for the other 10 days.

Results

A significant difference (p<0.001) was found between HAM and placebo periods regarding stool frequency after ten days of treatment [mean difference of 5.05 (95% CI: 3.5–6.49)]. Only one patient in arm A discontinued the treatment after three days for the appearance of watery diarrhea that disappeared in 24 hours.

Conclusion

In this double-blind randomized placebo-controlled cross-over pilot study, HAM seems to offer an advantage in chronic constipation improving stool frequency without important side effects, showing that anthranoid laxatives are effective and safe.

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Correspondence to Roberto Tari.

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Tari, R., Carmagnola, S., Pagliarulo, M. et al. Are anthranoid laxatives effective in chronic constipation?. Nutrafoods 11, 131–136 (2012). https://doi.org/10.1007/s13749-012-0052-9

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  • DOI: https://doi.org/10.1007/s13749-012-0052-9

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