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Updates in drug-induced acute pancreatitis
Egyptian Liver Journal volume 10, Article number: 49 (2020)
Being infrequent, drug-induced acute pancreatitis (DIP) is an overlooked clinical entity that can be serious with significant morbidity and mortality.
A renovative review of drugs incriminated in acute pancreatitis had been presented with all relevant data and case presentations. Antibiotics, antidiabetics, antihypertensive agents, H2 blockers (H2B) and proton pump inhibitors (PPIs), anticancer therapies, and the new direct-acting antiviral therapies (DAAs) of hepatitis C virus (HCV) were discussed pertinently to DIP.
DIP should be suspected as a potential adverse event to every newly emerged drug. Herein, an updated review of drugs recently alleged to be implicated in DIP.
Prevalence of DIP
Drug-induced pancreatitis, a potentially forgotten diagnosis that should be rigorously appreciated. In fact, the increasing number of pharmacological agents is associated with increased incidences of acute pancreatitis. Drug-induced pancreatitis represents up to 5% of all acute pancreatitis cases, hence, can be considered as the third common cause of acute pancreatitis after alcohol and gall stones are ruled out . The worldwide incidence of drug-induced pancreatitis is spanning around 5–80 per 100,000 adults. DIP is reported to be higher in patients with inflammatory bowel disease, also, in children, geriatric population, and with immunosuppression .
Currently, more than 500 drugs have been reported in the World Health Organization database as offenders of acute pancreatitis .
Diagnostic concerns of DIP
Discerning a diagnosis of DIP has neither clinical nor laboratory diagnostic criteria. However, the diagnosis of acute pancreatitis is clinically persuaded through disappearance of abdominal pain and drop of pancreatic enzymes upon drug discontinuation, exclusion of other common etiologies, and recurred manifestations upon challenging the suspected drug . Re-challenging the suspected drug is not feasible in critical patients; however, being applied will reduce the number of culprit medications. Exclusion of uncommon etiologies and other possible drugs than the drug of concern in multi-medicated patients is always difficult.
Badalov classification system of drug-induced acute pancreatitis contains 5 classes: Ia, Ib, II, III, and IV. The number of published cases, re-challenge, and latency provides the basis of Badalov classification (Table 1) .
The latency between initiation of the offending drug and developing acute pancreatitis can be short (less than 24 h), intermediate (1-30 days), and long (more than 30 days). According to Badalov, the latency is described as consistent with the drug-related pancreatitis when 75% of cases were related to any of the previously mentioned groups .
Review of potential offenders
Propofol introduced itself to the market about three decades ago as a safer short-acting anesthetic agent. Its use is extended as long-term hypnotic and sedative infusion in critically ill patients. Significant weight of publications and case reports mentioned a causal relationship between propofol and acute pancreatitis . A recent systematic review specified the propofol-pancreatitis relationship as probable . According to Badalov et al. classification system, propofol is a class Ia drug as acute pancreatitis is documented along with positive drug re-challenge . Propofol is suspended in a lipid emulsion that can be a factor in propofol-related hypertriglyceridemia in susceptible people. Propofol-related pancreatitis has been attributed to developed hypertriglyceridemia, a traditional etiology for acute pancreatitis . Hypertriglyceridemia more than 1000 mg/dl was documented at time of acute pancreatitis in reports of propofol-pancreatitis; however, in other propofol, pancreatitis was documented in absence of hypertriglyceridemia . Hence, acute pancreatitis inferred to propofol could have many mechanisms. Intensive care unit (ICU) patients and prolonged high rate propofol administration are considered risk factors for propofol-pancreatitis . Accordingly, monitoring serum triglycerides, amylase, and lipase is advisable in cases on prolonged propofol administration. Acute pancreatitis should be suspected in any patient developing abdominal pain after propofol infusion and the drug should be discontinued . Yet, this area of propofol-associated acute pancreatitis is considered as uncertain.
Minocycline is a tetracycline while tigecycline is a glycylcycline and a structural derivative of minocycline . Tigecycline shares similar pharmacokinetic properties and adverse effects with tetracyclines. Acute pancreatitis tightly linked to tetracycline was not listed in FDA approval of either minocycline or tigecycline .
Minocycline is widely used for treatment of acne vulgaris. Also indicated for methicillin-resistant Staphylococcus aureus (MRSA)-related infections and rheumatoid arthritis as a disease-modifying drug . A small case series described minocycline-induced pancreatitis in two cystic fibrosis patients in 2001 . The inherent pancreatic insufficiency in cystic fibrosis patients could play a contribution in this serious event. In these 2 cases, neither re-challenge nor consistent latency were existing and accordingly minocycline is specified as class III drug in Badalov classification for drug-induced acute pancreatitis . A newer two cases of minocycline-induced pancreatitis in non-cystic fibrosis patients had been recently published . In both cases, all other etiologies of acute pancreatitis have been excluded and resolution of the condition was achieved few days after minocycline discontinuation . Drug idiosyncrasy could explain minocycline pancreatitis in non-cystic fibrosis cases paralleling the explanation of minocycline-induced hepatotoxicity. Acute pancreatitis is a serious condition and clinicians should be aware of such minocycline-related adverse event. Currently, no identifiable risk factors for minocycline-induced pancreatitis.
Few case reports linked tigecycline to acute pancreatitis with variable time latency. In these cases, tigecycline was used to treat soft tissue infections except in a case of respiratory infection in a cystic fibrosis patient . Tigecycline discontinuation was followed by regression of symptoms and drop of pancreatic enzymes . The number of reported tigecycline pancreatitis is small and insufficient to lower its prescriptions . Concerning tigecycline pancreatitis, the retrospective analyses of phases 3 and 4 clinical studies revealed mixed conclusion. In respect to seriousness of acute pancreatitis, clinicians should be aware of this potential adverse effect and should monitor patients for features of pancreatitis during treatment with tigecycline .
In 2008 and in response to 30 post-marketing reports, FDA has ordered a warning label about a potential risk of acute pancreatitis in patients taking exenatide and sitagliptin, the first members of incretin-based therapies . Afterward, the FDA adverse drug events system received a large number of spontaneously reported cases of acute pancreatitis in those taking various incretin-based therapies . Further, observational studies have raised questions as to the possible association of treatment with incretin-based therapies, particularly with DPP-4 inhibitors and the risk of acute pancreatitis . In 2016, in JAMA, a large multicenter and population-based study had indicated a non-significant increased risk of incretin-associated acute pancreatitis compared to other antidiabetics . Also, the separate secondary analyses for glucagon-like peptide-1 (GLP1) agonists and dipeptidyl peptidase-4 (DDP4) inhibitors showed similar results.
Sodium-glucose cotransporter-2 inhibitors (SGLT2 inhibitors), a newly approved antidiabetics, have non-beta cell-dependent mechanism of action. They inhibit SGLT2 in the proximal renal tubules and thus preventing reabsorption of filtered glucose . Since approval, the literature received a handful of medical articles about a link between SGLT2 inhibitors, particularly, canagliflozin and acute pancreatitis. In 2016, FDA wrote in its website that there is a safety issue but did not mention about a causal relationship between SGLT2 inhibitors and pancreatitis. In 2018, Canada Health submitted a review investigating this issue. The review concluded that there may be a link between SGLT2 inhibitors and acute pancreatitis, and physicians should be vigilant to symptoms of acute pancreatitis in patients taking these drugs .
Case reports of acute pancreatitis induced by enalapril, lisinopril, captopril, ramipril, and perindopril have been published. Some of the published reports mentioned acute pancreatitis after lisinopril re-challenge. The proposed mechanism is pancreatic angioedema with pancreatic duct obstruction . A recent population-based study found that, in absence of alcohol, 7 per 10,000 attacks of acute pancreatitis/year are among users of angiotensin-converting enzyme (ACE) inhibitors .
Angiotensin receptor blockers (ARBs) induced pancreatitis have been introduced in a few case reports denoting a lesser risk of pancreatitis .
In many case reports, cimetidine and ranitidine have been associated with acute pancreatitis. Of note, acid-suppressing drugs can be prescribed for a prodrome of acute pancreatitis . It was determined that hypergastrinemia induced by continuous use of proton pump inhibitors (PPIs) can stimulate pancreatic enzyme secretion eventually resulting in pancreatitis . The literature contains several case reports of omeprazole-, pantoprazole-, and lansoprazole-induced pancreatitis. In more than one report, the pancreatitis was severe and necrotizing. In rats, intraperitoneal infusion of omeprazole resulted in pancreatic inflammation and elevated pancreatic enzymes. According to Badalov classification, proton pump inhibitors are specified as class I drugs based on positive re-challenge with the drug and consistent latency .
Anticancer drugs almost always carry the risk of precipitation acute pancreatitis. Many of the older and recently approved anticancer therapies have been listed to cause pancreatitis. From the older agents, asparaginase used for the treatment of acute lymphoblastic leukemia is the most frequently chemotherapeutic agent-causing pancreatitis . Asparaginase-related pancreatitis had been reported at an incidence of 2% to16%. Asparaginase pancreatitis is severe in up to 15% of patients and positive re-challenge is reported in up to 60% of cases . Cisplatin and oxaliplatin are listed as inducing pancreatitis and discontinuation of these drugs had showed regression of symptoms and laboratory evidence of pancreatitis . Everolimus and tamoxifen cause elevated serum triglycerides and hypertriglyceridemia can be the underlying mechanism of reported cases of everolimus and tamoxifen pancreatitis . In many case reports and small case series, newer anticancer agents, immune check point inhibitors, tyrosine kinase inhibitors, and proteasome inhibitors have been reported to cause acute pancreatitis . The proposed mechanisms of pancreatitis are immune-mediation direct toxicity or hypertriglyceridemia . In concern to immune check inhibitors, nivolumab- and pembrolizumab-related pancreatitis have been recently reported in 1.8% of patients. Also, ipilimumab approved for treatment of melanoma is reported to be associated with pancreatitis in less than 1% of cases.
Pancreatitis attributed to check point inhibitors is considered as immune toxicities and in all cases, corticosteroids were the therapeutic option. The older tyrosine kinase inhibitors (TKIs), sorafenib, sunitinib, and imatinib are reported to cause pancreatitis . Recent case reports have linked the newer tyrosine kinase inhibitors (TKIs), vemurafenib and ponatinib to pancreatitis and just elevated pancreatic enzymes. The famous proteasome inhibitor, bortezomib, has been repeatedly reported to cause pancreatitis .
Nonselective trans-arterial chemoembolization (TACE) may lead to elevated amylase in up to 40% of cases, while TACE-related pancreatitis can happen in up to 4% of cases. The larger the area infused with the chemotherapeutic agent, the greater the risk of pancreatitis . Post-TACE-necrotizing pancreatitis is thought to be ischemic in nature secondary to embolic blocking of the pancreatic blood supply .
The new direct-acting antiviral therapies (DAAs) of hepatitis C virus (HCV)
DIP occurrence with the previously known combination of peginterferon and ribavirin had been substantiated . Nevertheless, determination whether it is interferon or ribavirin-related effect is yet uncovered as all reported cases were on combination therapy. As both drugs are immune interfering, DIP might be an expected consequence.
Recently, the high safety profiles associating DAAs had denied any linkage with DIP occurrence. However, boceprevir and telaprevir were mentioned in such a fatal condition in two separate reports [37, 38]. Conversely, later generations of DAAs had been mentioned to cause DIP only in cases with ribavirin including regimens. In a 75-year-old male presenting with acute pancreatitis while on 3 weeks ombitasvir, paritaprevir, ritonavir, and dasabuvir (OTV/PTV/RTV/DSV) and ribavirin 1200 mg daily, a shift to ledipasvir/sofosbuvir regimen had improve the condition . Consequently, ribavirin was principally convicted in most cases of HCV therapeutics-induced pancreatitis. Data are still limited on the potential role and pathogenic mechanisms of DAAs as DIP offenders.
Literature has recently liberated several reports of case reports concerning DIP with an array of newly emerged drugs like propofol infusion, antidiabetics (GLP1 agonists and DDP4 inhibitors, and SGLT2 inhibitors, particularly, canagliflozin), antibiotics (minocycline), antihypertensive agents (enalapril, lisinopril, captopril, ramipril, perindopril, and less frequently angiotensin receptor blockers), proton pump inhibitors (omeprazole, pantoprazole, and lansoprazole), anticancer drugs (nivolumab, pembrolizumab, ipilimumab), the newer TKIs (vemurafenib and ponatinib), proteasome inhibitors (bortezomib), and non-selective TACE, and direct-acting antiviral therapies (DAAs) of hepatitis C virus along with ribavirin.
DIP, which is an overlooked diagnosis in the clinical setting, must be rigorously considered whenever patients are on a set of new drugs and presenting with even, minimal symptoms and signs of acute pancreatitis. Indeed, updated vigilant clinicians and critical care medical staff can save lives.
Availability of data and materials
Data used to support the findings of this study are included within the article.
Drug-induced acute pancreatitis
Intensive care unit
Food and Drug Association
Methicillin-resistant Staphylococcus aureus
Angiotensin-converting enzyme inhibitors
Angiotensin receptor blockers
Proton pump inhibitors
Tyrosine kinase inhibitors
Direct-acting antiviral therapies
Hepatitis C virus
Ombitasvir, paritaprevir, ritonavir, and dasabuvir
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All respect and indebtedness to the great professor Dr. Omkolsoum Alhaddad who created this work for her unlimited, sincere, and priceless inputs complying this work to be fulfilled.
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Alhaddad, O., Elsabaawy, M., Elfauomy, M. et al. Updates in drug-induced acute pancreatitis. Egypt Liver Journal 10, 49 (2020). https://doi.org/10.1186/s43066-020-00059-3