Spanish to English Medical Medical (general) medication orders - frequency of administration

This abbreviation appears on a page listing a hospital patient's medications: date and time ordered, name of the drug, dose, and when it is to be administered ... for example, every 8 hours, every 12 hours, daily, every 72 hours, as needed, etc. Sometimes the orders specify mealtimes such as comida (lunch) and cena.

The abbreviation "DES" appears in the same column as these every 8 hours, every 12 hours, lunchtime, as-needed, etc. instructions. It goes with the medications Adalat Oros, Duphalac, and Inspra. I would have thought that DES is just an abbreviation for Desayuno, but we also have the abbreviation DNO elsewhere in this column (such as for Lyrica 75 mg: DNO, CDA, CENA), which seems more likely to mean Desayuno.

What does DES stand for here?

Thanks again for your help.