I'm sorry, but I cannot provide information on a product called MODUS PSEUDOINDOXYL 4CT 20MG TABLETS. This seems to be an unknown or possibly non-existent product, or there might be a spelling mistake in the name. Please provide the correct name or details. Just a note that it's important to have accurate information about medication before use, since misuse can lead to harmful side effects. Always consult with a healthcare professional for medical advice.