Drug | Evidence | Postulated pathogenesis |
Moderate evidence |
Constipation-inducing drugs | - Predicted CI in patients with abdominal pain: 2.8 (1.1-7.1)[1]
- All drugs C-CS: Risk, 0.68 (0.62-1.27)[2]
- Opioids C-CS: Increased risk, 1.96 (1.43-2.67)[3]
- Nonopioids C-CS: Increased risk, 1.75 (1.25-2.44)[3]
| Reduced blood flow, increased intraluminal pressure[4] |
Immunomodulator drugs | - Antitumor necrosis factor-alpha inhibitors for rheumatoid arthritis from US FDA AERS: 17 probable, 18 possible cases; median age, 62 years*[5]
- Type 1 interferon:
- Alpha for hepatitis C: 13 probable, 4 possible cases; median age, 51 years*
- 11 other reported cases[6]
- Beta for multiple sclerosis: 19 probable, 20 possible cases; median age, 56 years
- 10 other reported cases of interferon for hepatitis C (8 cases with age <55 years)[7]
| Cytokines affecting thrombogenesis[8] |
Illicit drugs | - Amphetamines: 5 reported cases; age 42 to 50 years[8,9]
- Cocaine: Used by 19 of 97 (20%) CI patients at two inner-city hospitals; age 44 to 56 years; 37% right-sided and 16% small bowel disease; 26% mortality[10]
- Many other reported cases of multiple ischemic organs[8]
| Vasoconstriction, hypercoagulation, direct endothelial injury[8] |
Low evidence |
Antibiotics | - Antibiotic-associated colitis resembles CI, usually right-sided[8]
C-CS: Increased risk, 3.3 (2.19-4.96)[3] | Altered gut microbiome (eg, Klebsiella oxytoca)[11] |
Appetite suppressants | - Bitter orange (resembles ephedra): 1 reported case[12]
- Hydroxycut: 1 probable case*[13]
- Ma huang (mainly ephedrine): 1 reported case[14]
- Phentermine: 2 reported cases (1 with fenfluramine)[8,15]
- Xenadrine (bitter orange, ma huang, caffeine, salicin): 1 reported case[16]
| Vasoconstriction[8] |
Chemotherapeutic drugs | - R-CHOP: 1 reported case[17]
- Taxanes: 10 reported cases[8,18-20]
- Vinorelbine/cisplatin: 1 reported case[8]
- C-CS: Increased use of taxanes or vinca alkaloids on univariate analysis[3]
| Direct epithelial toxicity, inhibited repair of vascular injury[8] |
Decongestants | - Pseudoephedrine: 9 reported cases (6 cases with age <50 years)[8,21]
C-CS: Risk unaffected, 1.1 (0.3-3.9)[22] - Phenylephrine: 1 reported case[23]
| Vasoconstriction[8] |
Diuretics | - C-CS: Increased risk, 1.6 (1.2-2.1)[22]
| Extracellular volume deficit, lower peripheral vascular resistance, vasoconstriction[8] |
Ergot alkaloids (often combined with caffeine) | | Vasoconstriction[8] |
Hormonal therapies | - Predominance of women among young patients[25,26], common use of female hormones by female patients[27]
- Female hormones C-CS: Increased risk, 1.88 (1.30-2.73)[3]
- Oral contraceptives C-CS: Increased risk, 1.05 (1.00-1.10)[28]; risk unaffected, 0.59 (0.28-1.33)[29]; 0.7 (0.3-1.5)[22]
- Estrogen replacement C-CS: Risk unaffected, 0.75 (0.67-1.19)[29]; 1.0 (0.7-1.5)[22]
| Hypercoagulability, endothelial injury[8] |
Laxatives | - Osmotic agents: 2 reported cases[8]
- Bisacodyl: 2 reported cases[8]
- Bisacodyl/polyethylene glycol: 1 reported case of 2 episodes[30]
- Lubiprostone: 1 reported case[31]
- All drugs C-CS: Increased risk, 4.73 (3.71-6.02)[28]
| Increased motility or rapid intravascular volume deficit, reduced perfusion[8] |
Psychotropic drugs | - 6 reported cases (2 with hypotension)[8,32,33]
- 10 cases, clinical/pathological data incomplete[34]
- C-CS: Increased risk, 3.7 (1.3-11.0)[22]
| Hypotension, constipation |
Serotoninergic drugs | - 5-hydroxytryptamine1 receptor agonists: 12 cases from US FDA AERS (8 cases with age <50 years)[8,35-37]
- 5-hydroxytryptamine3 receptor antagonist: 1 case of CI/1000 patient-years of use[38]
- 5-hydroxytryptamine4 partial agonist: 27 reported cases (drug withdrawn)[39]
| For 5-hydroxytryptamine1 receptor agonists vasoconstriction[8]; for other agents various factors[39] |
Very low evidence |
Digitalis | - 1 reported case (poisoning)[8]
- Digoxin C-CS: Increased risk, 3.6 (2.1-6.2)[22]; atrial fibrillation not analyzed; decreased risk, 0.27 (0.083-0.86)[40]
| Vasoconstriction |
Kayexalate | - 1 reported case[41]
- 44 cases of colon injury with incomplete pathological data[42]
| Direct toxic effect, various non-drug factors[41,42] |
NO-Xplode | | Blood shunting to skeletal muscle, hypoperfusion, various non-drug factors[43] |
NSAIDs | - Reported cases not clearly distinguishable from NSAID-induced colopathy[8]
- C-CS: Risk unaffected, 0.9 (0.6-1.2)[22]; 0.68 (0.62-1.27)[44]
| Inhibition of vasodilating prostaglandins, vasoconstriction[8] |
Statins | | None |
Vasopressors | | Vasoconstriction |