What does the abbreviation "ud" mean in medication instructions?

The abbreviation "ud" stands for "ut dictu," which translates to "as directed" in English. This term is commonly used in medication instructions to indicate that a medication should be taken according to the specific directions provided by the healthcare provider or as per the patient's individual needs. It suggests a level of flexibility in dosage or timing based on professional guidance or the patient's condition, rather than a fixed schedule. Understanding this abbreviation is crucial for accurate medication administration and ensuring that patients follow their prescribed regimen correctly.