However, the following side effects are seen in between 1 and 10 patients in 1,000: hyperkalaemia (high blood potassium levels), syncope (fainting), insomnia (difficulty sleeping), vertigo (a spinning sensation), hypotension (low blood pressure), dyspnoea (difficulty breathing), abdominal (tummy) pain, diarrhoea, dry mouth, dyspepsia (heartburn), flatulence (gas), hyperhidrosis (excessive sweating), pruritus (itching), myalgia (muscle pain), renal impairment (kidney problems) including renal failure (kidney failure), and chest pain.