What are two disadvantages of many liquid medications for enteral administration?

• A. They are hyperosmolar which can lead to diarrhea; they may have high viscosity which can lead to tube clogging
• B. They are always compatible with formulas
• C. They are inexpensive
• D. They never cause clogging

Answer: (A)

The issue tested here is how the physical properties of liquid meds affect delivery through enteral tubes. Many liquid medications are hyperosmolar, meaning they draw water into the GI lumen. This can lead to diarrhea and electrolyte disturbances in patients who are already receiving tube feeds, since the added osmotic load disrupts fluid balance in the gut. Another common drawback is high viscosity. Thick liquids are harder to push through feeding tubes, increasing the risk of partial or complete tube clogging and making it harder to deliver an accurate, complete dose.

Notes: statements claiming they’re always compatible with formulas, that they’re inexpensive, or that they never cause clogging don’t reflect real practice; compatibility varies, clogging can occur, and cost is not reliably linked to the disadvantage being discussed.