I en klinisk undersøgelse med patienter, som tidligere havde haft tør hoste under behandling med en ACE- hæmmer, konstateredes tør hoste hos 19, 5% af patienterne i valsartanbehandling, 19, 0% i thiazidbehandling, sammenholdt med 68, 5% i behandling med en ACE- hæmmer (P < 0, 05).
In a clinical trial of patients with a history of dry cough during ACE inhibitor therapy, 19.5% of trial subjects receiving valsartan and 19.0% of those receiving a thiazide diuretic experienced cough compared to 68.5% of those treated with an ACE inhibitor (P < 0.05).