From the gastrointestinal tract:
Spastic pains in the abdomen, nausea, vomiting, diarrhea, flatulence, atony of the large intestine, pigmentation of the large intestine (deposition of melanin pigment in the mucosa of the colon).
Allergic reactions: skin itching, erythema, skin rash.
From the genitourinary system:
Yellowish brown or reddish urine staining (due to metabolites excreted by the kidneys, this is not a pathological sign and passes after discontinuation of the drug), proteinuria, hematuria (with prolonged use, especially in high doses).
Metabolic disorders:
Hypovolemia, hypokalemia (with prolonged admission, especially in high doses, with diuretics, corticosteroids and cardiac glycosides), secondary hyperaldosteronism.
Other:
Fatigue, confusion, muscle cramps (with prolonged use).
If any of the side effects listed in the manual are aggravated, or if you notice any other side effects not listed in the instructions, tell your doctor.