Patients must be advised to inform the doctor or pharmacist if they are using, have recently used or might use any other medicines.
The concomitant use of wound-treatment preparations containing a so-called enzymatic component leads to a weakening of the effects of both substances. Products containing mercury, silver, hydrogen peroxide, and taurolidine may interact with povidone-iodine and should not be used concomitantly.
Simultaneous use with mercury products may lead to the formation of a substance, which can damage the mucosa.
Using this treatment may interfere with tests of thyroid function and can make a planned treatment of the thyroid with iodine impossible. After the end of the treatment 4 weeks should be allowed before a new scintigram is carried out.
Several types of tests for detecting occult (not visible) blood in faeces or blood in urine may be affected (i.e. produce false-positive results).
Povidone-iodine products when used before or after application of octenidine may lead to transient dark discolourations at the application site.