How to administer Zoloft (sertraline) via a percutaneous endoscopic gastrostomy (PEG) tube?

Administering Zoloft (Sertraline) via PEG Tube

Sertraline should be administered via PEG tube using the liquid formulation (oral concentrate) whenever possible, with each dose preceded and followed by a 30-40 mL water flush to prevent tube occlusion. 1, 2

Preferred Formulation

• Liquid formulations are strongly preferred over tablets for PEG tube administration because they reduce the risk of tube occlusion and ensure accurate dosing. 1
• Sertraline is available as an oral concentrate (20 mg/mL), which is the optimal formulation for PEG tube delivery. 1
• If only tablets are available, consult a pharmacist before crushing, as certain medications may have absorption or safety issues when crushed. 1

Preparation Protocol (If Crushing Tablets Required)

• Use a mortar and pestle to crush the tablet into a fine powder. 1
• Dissolve the crushed tablet completely in an appropriate volume of water (at least 15-30 mL) before administration. 1
• Never administer crushed tablets as a dry powder, as this significantly increases occlusion risk. 1

Administration Technique

• Flush the PEG tube with 30-40 mL of plain water before administering sertraline to ensure tube patency. 1, 2, 3
• Draw up the liquid sertraline (or dissolved crushed tablet) into an appropriate syringe using ENFit-standard equipment to prevent misconnection errors. 1
• Administer the medication through the tube using gentle, steady pressure. 2
• Immediately flush with another 30-40 mL of plain water after administration to clear all medication from the tube. 1, 2, 3
• If administering multiple medications, give each one separately with water flushes between each medication—never mix medications together. 1, 3

Critical Pitfalls to Avoid

• Never shake ENFit syringes to remove drug residue, as this exposes personnel to medication and alters the delivered dose. 1
• Never mix sertraline with other medications before administration due to risk of drug-drug interactions and precipitation that can occlude the tube. 1, 3
• Avoid using insufficient water volume for flushing (less than 30 mL), as this is a primary cause of tube occlusion. 2, 3
• Do not use carbonated beverages, juices, or other fluids for flushing—only plain water should be used. 2, 3

Dosing Considerations

• The standard therapeutic dose of sertraline is 50 mg daily, which can be administered at any time of day via PEG tube. 4
• Sertraline has a 22-36 hour elimination half-life, making once-daily administration appropriate. 5
• No dose adjustment is required for elderly patients receiving sertraline via PEG tube. 4

Tube Maintenance

• Flush the PEG tube with 30-40 mL of water at least once daily, even on days when medications or feeds are not administered, to maintain patency. 2, 3
• Polyurethane PEG tubes are preferable to silicone tubes for medication administration due to better retention of patency. 1, 3
• If the tube becomes occluded, first attempt flushing with warm water; if unsuccessful, use an alkaline solution of pancreatic enzymes. 2, 3