Do levothyroxine, empagliflozin (Jardiance), sacubitril/valsartan (Entresto), and tramadol cause gastrointestinal pain?

Yes, all four medications can cause GI pain, but tramadol is the most concerning culprit.

Tramadol is an opioid that commonly causes gastrointestinal symptoms including abdominal pain, nausea, vomiting, and constipation 1. The AGA explicitly recognizes tramadol as an opioid with potential for addiction and opioid-associated adverse events 1. Chronic opioid use can paradoxically worsen abdominal pain through narcotic bowel syndrome, characterized by chronic or frequently recurring increases in abdominal pain despite continued or escalating opioid dosages 1. This occurs in approximately 6% of patients on long-term opioids and represents a serious complication that can be difficult to distinguish from other pain syndromes.

Medication-Specific GI Pain Profiles:

Tramadol (Highest Risk)

• Direct GI effects: Abdominal pain, nausea, vomiting, constipation are common side effects
• Narcotic bowel syndrome risk: Paradoxical worsening of abdominal pain with continued use
• Mechanism: Opioid receptor activation increases non-propulsive intestinal contractions, reduces motility, and can cause significant constipation-related pain 2

Entresto/Sacubitril-Valsartan (Moderate Risk)

• Diarrhea is a recognized adverse effect that can be associated with abdominal cramping 3
• Pharmacovigilance data shows diarrhea occurs more frequently with sacubitril/valsartan compared to valsartan alone (ROR = 11.19) 3
• Typically occurs with median delay of 3 days, more common in males around age 70 3
• The sacubitril component appears to play a specific role in causing diarrhea beyond the valsartan effect 3

Jardiance/Empagliflozin (Lower Risk, Context-Dependent)

• Generally well-tolerated for GI symptoms
• Research actually suggests protective effects on gastric mucosa, with increased mucin production and milder inflammation in experimental models 4
• However, the FDA label 5 does not list abdominal pain as a common adverse effect
• SGLT2 inhibitors as a class are not typically associated with significant GI pain

Levothyroxine (Lowest Risk)

• GI symptoms occur primarily with overdosage/hyperthyroidism: abdominal cramps, diarrhea, vomiting 6
• Hypersensitivity reactions (rare) can include abdominal pain, nausea, vomiting, diarrhea 6
• At appropriate therapeutic doses, GI pain is uncommon

Clinical Approach:

If a patient on these medications develops GI pain, prioritize evaluation in this order:

1. Assess tramadol use first: Duration, dose escalation patterns, temporal relationship to pain onset. Consider narcotic bowel syndrome if pain is worsening despite continued opioid use 1

2. Evaluate Entresto timing: Did diarrhea/cramping start within days of initiation or dose change? More likely in older males 3

3. Check levothyroxine dosing: Obtain TSH to rule out overreplacement causing hyperthyroid symptoms 6

4. Consider Jardiance last: Least likely culprit for GI pain; may actually be protective 4

Critical Pitfall:

Do not continue escalating tramadol doses in response to worsening abdominal pain—this may represent narcotic bowel syndrome rather than undertreated pain 1. The primary treatment is opioid cessation with behavioral and psychiatric support, not dose increases.