Cyproheptadine: A Potentially Effective Treatment for Functional Gastrointestinal Disorders in Children

Non-pharmacological management of pediatric functional abdominal pain disorders: Current evidence and future perspectives

Functional abdominal pain disorders (FAPDs) are an important and prevalent cause of functional gastrointestinal disorders among children, encompassing the diagnoses of functional dyspepsia, irritable bowel syndrome, abdominal migraine, and the one not previously present in Rome III, functional abdominal pain not otherwise specified. In the absence of sufficiently effective and safe pharmacological treatments for this public problem, non-pharmacological therapies emerge as a viable means of treating these patients, avoiding not only possible side effects, but also unnecessary prescription, since many of the pharmacological treatments prescribed do not have good efficacy when compared to placebo. Thus, the present study provides a review of current and relevant evidence on non-pharmacological management of FAPDs, covering the most commonly indicated treatments, from cognitive behavioral therapy to meditation, acupuncture, yoga, massage, spinal manipulation, moxibustion, and physical activities. In addition, this article also analyzes the quality of publications in the area, assessing whether it is possible to state if non-pharmacological therapies are viable, safe, and sufficiently well-based for an appropriate and effective prescription of these treatments. Finally, it is possible to observe an increase not only in the number of publications on the non-pharmacological treatments for FAPDs in recent years, but also an increase in the quality of these publications. Finally, the sample selection of satisfactory age groups in these studies enables the formulation of specific guidelines for this age group, thus avoiding the need for adaptation of prescriptions initially made for adults, but for children use.

Effect and Mechanism of Herbal Medicines on Cisplatin-Induced Anorexia

Cisplatin is a well-known chemotherapeutic agent used to treat various types of cancers; however, it can also induce anorexia, which results in reduced food intake, loss of body weight, and lower quality of life. Although drugs such as megestrol acetate and cyproheptadine are used to decrease this severe feeding disorder, they can also induce side effects, such as diarrhea and somnolence, which limit their widespread use. Various types of herbal medicines have long been used to prevent and treat numerous gastrointestinal tract diseases; however, to date, no study has been conducted to analyze and summarize their effects on cisplatin-induced anorexia. In this paper, we analyze 12 animal studies that used either a single herbal medicine extract or mixtures thereof to decrease cisplatin-induced anorexia. Among the herbal medicines, Ginseng Radix was the most used, as it was included in seven studies, whereas both Glycyrrhizae Radix et Rhizoma and Angelicae Gigantis Radix were used in four studies. As for the mechanisms of action, the roles of serotonin and its receptors, cytokines, white blood cells, ghrelin, and leptin were investigated. Based on these results, we suggest that herbal medicines could be considered a useful treatment method for cisplatin-induced anorexia.

Pharmacotherapy for the Treatment of Gastric Antral Vascular Ectasia: A Narrative Review

Gastric antral vascular ectasia (GAVE) is an uncommon clinical entity leading to recurrent gastrointestinal bleeding. There is no consensus regarding treatment of GAVE. Endoscopic therapy is the preferred treatment option, but has a fairly high recurrence rate. Surgical resection can completely resolve GAVE, but is invasive with a relatively high risk of postoperative complications. Recently, the role of pharmacotherapy for GAVE has been recognized. However, the evidence is limited to scattered case reports or small case series. This review comprehensively summarizes the efficacy and side effects of drugs commonly used for the treatment of GAVE, including octreotide, cyproheptadine, cyclophosphamide, prednisolone, estrogen-progesterone, thalidomide, bevacizumab, and tranexamic acid.

Female serotonin transporter-knockout rat: A potential model of irritable bowel syndrome

Irritable bowel syndrome (IBS) is a common functional gastrointestinal disease. Although visceral hypersensitivity (VH) and disturbed gastrointestinal motility are typical pathophysiological features of IBS, the pathological mechanisms underlying this disease remain unclear. Serotonin system abnormalities are considered to play an important role in the pathomechanisms of IBS. Here, we hypothesize that similar alterations, including VH and colonic motility, induced by serotonin transporter (SERT) knockout result from altered serotonin signaling. We sought to determine the molecular mechanism underlying VH and colonic dysmotility induced by SERT knockout. We found that female SERT (slc6a4)-knockout (KO; ie, slc6a4^-/- ) rats exhibited lower pain pressure thresholds (PPTs) than wild-type (WT; ie, slc6a4^+/+ ) rats in response to colorectal distension (CRD). Significantly increased fecal pellet output and reduced concentration of serum tryptophan were observed in the female SERT KO rats. The concentrations of 5-hydroxytryptamine (5-HT) in platelet-rich plasma (PRP) and serum in SERT KO rats were lower than those in WT rats, but the numbers of enterochromaffin cells (ECs) and the concentrations of 5-HT in colon of SERT KO rats were higher than those of WT rats. Finally, increased expression levels of 5-HT_1B receptors, 5-HT_2C receptors, 5-HT_3A receptors, 5-HT_3B receptors, 5-HT₆ receptors, 5-HT₇ receptors, and glycosylated dopamine transporters (DATs) were found in the female SERT KO rats. We concluded that alterations in the serotonin system induced by the knockout of slc6a4 might result in VH and accelerated gastrointestinal motility in female SERT KO rats, which can be used as an animal model of IBS.

Paediatric functional abdominal pain disorders

Paediatric functional abdominal pain disorders, currently referred to as disorders of gut-brain interaction, comprise irritable bowel syndrome, functional dyspepsia, abdominal migraine and functional abdominal pain not otherwise specified, as defined by the Rome IV diagnostic criteria. Functional abdominal pain disorders are common disorders with a prevalence of 3-16% depending on country, age and sex. A greater understanding of aetiopathogenesis and pathophysiology is emerging and includes intestinal components (inflammation, motility and the microbiota), central factors (psychological aspects, sensitization and/or differences in connectivity or activity of certain brain regions) as well as extrinsic factors (infections). In particular, the timing of disruption of the microbiota-gut-brain axis seems to be important. Diagnosis is challenging but is primarily based on clinical symptoms and exclusion of other organic causes, with an emphasis on avoiding unnecessary invasive diagnostic procedures. The available pharmacological interventions are limited in children and, therefore, management has focused on combined approaches, including mind-targeted interventions (hypnotherapy and cognitive behavioural therapy), diet (probiotics) and percutaneous electrical nerve field stimulation. The evidence for their clinical efficacy, although limited, is favourable, with positive impacts on symptoms and overall quality of life. The coming decades hold promise for improved understanding and management of these enigmatic disorders.

Cyclic Vomiting Syndrome in Children

Cyclic Vomiting Syndrome (CVS) is an underdiagnosed episodic syndrome characterized by frequent hospitalizations, multiple comorbidities, and poor quality of life. It is often misdiagnosed due to the unappreciated pattern of recurrence and lack of confirmatory testing. CVS mainly occurs in pre-school or early school-age, but infants and elderly onset have been also described. The etiopathogenesis is largely unknown, but it is likely to be multifactorial. Recent evidence suggests that aberrant brain-gut pathways, mitochondrial enzymopathies, gastrointestinal motility disorders, calcium channel abnormalities, and hyperactivity of the hypothalamic-pituitary-adrenal axis in response to a triggering environmental stimulus are involved. CVS is characterized by acute, stereotyped and recurrent episodes of intense nausea and incoercible vomiting with predictable periodicity and return to baseline health between episodes. A distinction with other differential diagnoses is a challenge for clinicians. Although extensive and invasive investigations should be avoided, baseline testing toward identifying organic causes is recommended in all children with CVS. The management of CVS requires an individually tailored therapy. Management of acute phase is mainly based on supportive and symptomatic care. Early intervention with abortive agents during the brief prodromal phase can be used to attempt to terminate the attack. During the interictal period, non-pharmacologic measures as lifestyle changes and the use of reassurance and anticipatory guidance seem to be effective as a preventive treatment. The indication for prophylactic pharmacotherapy depends on attack intensity and severity, the impairment of the QoL and if attack treatments are ineffective or cause side effects. When children remain refractory to acute or prophylactic treatment, or the episode differs from previous ones, the clinician should consider the possibility of an underlying disease and further mono- or combination therapy and psychotherapy can be guided by accompanying comorbidities and specific sub-phenotype. This review was developed by a joint task force of the Italian Society of Pediatric Gastroenterology Hepatology and Nutrition (SIGENP) and Italian Society of Pediatric Neurology (SINP) to identify relevant current issues and to propose future research directions on pediatric CVS.

Economic Impact and Prognostic Factors of Functional Dyspepsia in Children

OBJECTIVES

Functional dyspepsia (FD) is a functional abdominal pain disorder. There is paucity of data on the economic impact of FD in children. Primary aim of our study was to estimate annual evaluation cost ("diagnosis and visit" cost) and secondary aim was to identify potential prognostic factors of FD in children.

METHODS

Out of the 136 patients 86 met inclusion criteria and were divided into 2 clinical groups: Complete Improvement Group (CIG-30 patients) and Partial/No Improvement Group (PIG/NIG-56 patients). Medications used were noted descriptively. Annual evaluation cost was calculated using 2017 Medicare reimbursement rates.

RESULTS

Annual evaluation cost in all patients was $724.874 ± $180.075 ($544.799 ± $87.995 in CIG and $904.949 ± 79.083 in PIG/NIG). An extrapolated annual cost of evaluation in children with FD would be approximately $5.79 billion. Average number of clinic visits (3.1 ± 1.2 in CIG vs 4.40 ± 3.1 in PIG/NIG), duration of follow-up in months (9.2 ± 6.6 in CIG vs 17.1 ± 13.6 in PIG/NIG), use of imaging studies (7 patients in CIG [23.3%] vs 29 in PIG/NIG [51.8%]) and endoscopic procedures (17 in CIG [56.7%] vs 46 in PIG/NIG [82.1%]) were significantly higher in PIG/NIG (P < 0.005). PIG/NIG required multiple medications for control of symptoms compared to CIG (4 patients in CIG [13.5%] vs 30 in PIG [53.6%], P value <0.001]. For every $500.00 decrease in total evaluation cost the odds of having a complete response was 0.998 (P = 0.027). No prognostic factors were identified in children with FD.

CONCLUSIONS

FD in children has a significant economic impact on health care expenditure. Patients with FD who have partial/no response to treatment incur greater financial cost potentially adding to health care expenditure.

A Functional Approach to Feeding Difficulties in Children

PURPOSE OF REVIEW

This review provides an approach for resolving a variety of feeding difficulties in children, ranging from normal eating behavior that is misperceived as a problem to substantial feeding disorders.

RECENT FINDINGS

Criteria to identify pediatric feeding disorders have been thoroughly addressed in the newly established designations of avoidant restrictive food intake disorder (ARFID) and pediatric feeding disorder (PFD). These diagnostic criteria improve the accuracy of identifying, classifying, and managing significant feeding disorders in young children. While recent definitions of feeding difficulties are particularly appropriate in multidisciplinary settings, in this paper, we advocate for a progressive approach of managing feeding problems in all clinical settings. It begins by identifying red flags indicative of serious threats to the child, screening for oral motor dysfunction, stabilizing nutrient intake, and eliminating aversive feeding practices. The next step, if eating behavior does not improve, involves strategies that target specific eating behaviors and parental feeding styles. In severe or resistant cases, referral to specialists or interdisciplinary feeding teams is advised.

The Management of Paediatric Functional Abdominal Pain Disorders: Latest Evidence

Recurrent abdominal pain (RAP) is one of the most common health complaints in both children and adults. Although RAP is considered a functional disorder rather than an organic disease, affected children and their families can still experience anxiety and concerns that can interfere with school, sports, and regular daily activities and lead to frequent attendances at pediatric emergency departments or pediatric gastroenterology clinics. Our review shows experts do not agree on a universally proven management that will work on every child presenting with functional abdominal pain (FAP). Treatment strategies include both non-pharmacological and pharmacological options. Non-pharmacological treatments are usually very well accepted by both children and their parents and are free from medication side effects. Nevertheless, they may be as effective as the pharmacological interventions; therefore, according to many experts and based on the majority of current evidence, a non-pharmacological approach should be the first intervention attempt in children with RAP. In particular, the importance of the bio-psychosocial approach is highlighted, as a majority of children will improve with counselling and reassurance that no serious organic pathologies are suspected, especially when the physician establishes a trustful relationship with both the child and their family. Placebo and pharmacological interventions could be attempted when the bio-psychosocial approach is not applicable or not efficacious. In some difficult cases, finding an effective treatment for FAP can be a challenge, and a number of strategies may need to be tried before symptoms are controlled. In these cases, a multidisciplinary team, comprising a pediatric gastroenterologist, dietician, psychologist, and psychotherapist, is likely to be successful.

Prophylactic Therapy of Cyclic Vomiting Syndrome in Children: Comparison of Amitriptyline and Cyproheptadine: A Randomized Clinical Trial

OBJECTIVES

Cyclic vomiting syndrome (CVS) is a common functional gastrointestinal disorder characterized by recurrent episodes of nausea and vomiting. There is no definite treatment for the condition, although some medications are recommended. We aimed to compare the efficacy of amitriptyline and cyproheptadine in prophylactic therapy of CVS.

METHODS

This is a single-blinded randomized clinical trial conducted during 2015-2016 in Isfahan, Iran. Sixty-four children who were 3-15 years old, with a diagnosis of CVS (based on Rome III criteria), were included in the study and were randomly divided into two groups of amitriptyline and cyproheptadine. They were followed for 6 months, looking for frequency and duration of attacks as the primary outcome.

RESULTS

The mean monthly frequency of attacks in the last 2 months of the study in the amitriptyline and cyproheptadine group were 0.38±0.55 and 0.59±0.71, respectively (P-value=0.197), after intervention. The mean duration of attacks between amitriptyline and cyproheptadine group were 1.41±2.86 and 1.81±2.22 h, respectively (P-value=0.212). In the amitriptyline group 65.6% of patients reported 100% remission, whereas in the cyproheptadine group 50% reported full remission (P-value=0.206).

CONCLUSIONS

There was no superiority of one of the medications over the other. We did not find any age-related effect on the efficacy of these medications as well.