Perez‐Miranda 1996.

Methods	Parallel randomised controlled trial Computer generated list* Endoscopist and analyst blinded*. Health providers and patients not blinded (Patients not aware of therapeutic effect*)
Participants	50 outpatients with internal bleeding hemorrhoids (I‐IV) referred to colorectal outpatient clinic Mean age 48, 42% women
Interventions	Plantago ovata (11.6 g/day vs. placebo (vitamin B preparation) 40 days of treatment
Outcomes	‐Average number of bleeding episodes ‐Number of congested hemorrhoidal cushions ‐Hemorrhoids bleeding on contact ‐Degree of prolapse ‐Adverse events
Notes	Undertaken without funding*
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	High risk	C ‐ Inadequate