Misoprostol for the prevention and treatment of postpartum hemorrhage

Development and validation of a stability-indicating method, structural elucidation of new degradation products from misoprostol by LC-MS time-of-flight, and an ex vivo study of vaginal permeation

Misoprostol (MSP) is commonly prescribed in obstetrics and gynecology clinical practice for labor induction, cervical ripening, first-trimester pregnancy termination, and the treatment of postpartum hemorrhage. Furthermore, there is a lack of comprehensive discussion evaluating how different commercially available formulations influence the overall efficacy of MSP, even though reports indicate issues with the quality of these formulations, particularly regarding stability and vaginal absorption processes. This study investigates the stability of MSP under acidic conditions and its in vitro permeation using swine vaginal mucosa. A forced degradation study was conducted using 0.2 M HCl, and a high-efficiency LC method was developed. Three degradation products were identified and characterized using electrospray ionization-high-resolution quadrupole-time-of-flight-MS, with respective m/z values of 391.2508, 405.2705, and 387.2259, respectively. These results suggest that the degradation mechanism involves dehydration of the β-hydroxy ketone moiety, followed by isomerization to its most resonance-stable form and de-esterification. Finally, the in vitro permeation study revealed that the esterified form of MSP was unable to permeate the mucosa and required prior degradation for any component to be detected in the receptor fluid.

Integrative transcriptomics and proteomics analyses to reveal the therapeutic effect and mechanism of Buxue Yimu Pills in medical-induced incomplete abortion rats

ETHNOPHARMACOLOGICAL RELEVANCE

Medical abortions using mifepristone and misoprostol have been approved in many countries for early pregnancy loss. Despite its high success rate, this medication regimen can result in incomplete abortion, which is responsible for endometrial damage, prolonged uterine bleeding, abdominal pain, etc. Buxue Yimu Pills (BYP) is a famous Chinese medicine prescription that is widely used in the field of gynecology and obstetrics for treating patients with postpartum complications. However, the therapeutic effect and mechanism of BYP remain to be explored.

AIM OF THE STUDY

This study aimed to clarify the therapeutic effect and mechanism of action of BYP in postpartum complications using mifepristone and misoprostol-induced incomplete abortion in rats.

MATERIALS AND METHODS

Experimental medical-induced incomplete abortion model rats were constructed using mifepristone and misoprostol, and further treated with saline or BYP by intragastric administration. Detailed information regarding the changes in mRNA and protein levels in the uterine tissues of rats regulated by BYP was illustrated by RNA sequencing (RNA-seq) analysis and quantitative proteomics analysis. The differentially expressed genes and proteins were further subjected to Gene Ontology (GO) and pathway enrichment analyses and further verified using quantitative Real-time PCR (qRT-PCR) analysis and western blot assay.

RESULTS

BYP administration markedly alleviated the increase in serum prostaglandin F2α (PGF2α) and expression of PGF2α receptor (PGF2αR) in uterine tissues and inhibited the decrease in serum chorionic gonadotrophin (CG). Compared with the model group, 674 genes were upregulated and 344 genes were downregulated by BYP administration; 108 proteins were upregulated and 48 proteins were downregulated by BYP administration. qRT-PCR analysis of the uterine tissues showed that BYP treatment reversed the variation tendency of genes, including Mmp7, Mmp14, Timp2, Col6a4, Jak2, Wnt7a, and Mylk compared with the model group. Western blot analysis showed that BYP administration affected PKCδ, Collagen VI, MMP7, TIMP2, MLCK, and p-MLC protein levels.

CONCLUSION

BYP administration facilitated uterine recovery in medical-induced incomplete abortion rats, and this therapeutic effect involved various targets and biological processes, including the TIMP2/MMP7 and MLCK/p-MLC signaling pathways, etc.

Prostaglandins for Postpartum Hemorrhage: Pharmacology, Application, and Current Opinion

BACKGROUND

Postpartum hemorrhage (PPH) remains a common cause of maternal mortality worldwide. Medical intervention plays an important role in the prevention and treatment of PPH. Prostaglandins (PGs) are currently recommended as second-line uterotonics, which are applied in cases of persistent bleeding despite oxytocin treatment.

SUMMARY

PG agents that are constantly used in clinical practice include carboprost, sulprostone, and misoprostol, representing the analogs of PGF2α, PGE2, and PGE1, respectively. Injectable PGs, when used to treat PPH, are effective in reducing blood loss but probably induce cardiovascular or respiratory side effects. Misoprostol is characterized by oral administration, low cost, stability in storage, broad availability, and minimal side effects. It remains a treatment option for uterine atony in low-resource settings, but its effectiveness as a uterotonic for independent application may be limited. Key Messages: The present review article discusses the physiological roles of various natural PGs, evaluates the existing evidence of PG analogs in the prevention and treatment of PPH, and finally provides a reference to assist obstetricians in selecting appropriate uterotonics.

A Stalled Revolution? Misoprostol and the Pharmaceuticalization of Reproductive Health in Francophone Africa

Misoprostol entered the global market under the name Cytotec in the mid-1980s for the treatment of gastric ulcers. Decades of research have since demonstrated the safety and effectiveness of off-label use of misoprostol as a uterotonic in pregnant women to prevent and treat post-partum hemorrhage, treat incomplete abortion, or terminate first-trimester pregnancy. Global health experts emphasize misoprostol's potential to revolutionize access to reproductive health care in developing countries. Misoprostol does not require refrigeration, can be self-administered or with the aid of a non-physician, and is relatively inexpensive. It holds particular promise for improving reproductive health in sub-Saharan Africa, where most global maternal mortality related to post-partum hemorrhage and unsafe abortion occurs. Although misoprostol has been widely recognized as an essential obstetric medication, its application remains highly contested precisely because it disrupts medical and legal authority over pregnancy, delivery, and abortion. I draw on fieldwork in Francophone Africa to explore how global health organizations have negotiated misoprostol's abortifacient qualities in their reproductive health work. I focus on this region not only because it has some of the world's highest rates of maternal mortality, but also fertility, thereby situating misoprostol in a longer history of family planning programs in a region designated as a zone of overpopulation since the 1980s. Findings suggest that stakeholders adopt strategies that directly address safe abortion on the one hand, and integrate misoprostol into existing clinical protocols and pharmaceutical supply systems for legal obstetric indications on the other. Although misoprostol has generated important partnerships among regional stakeholders invested in reducing fertility and maternal mortality, the stigma of abortion stalls its integration into routine obstetric care and availability to the public. I demonstrate the promises and pitfalls of pharmaceuticalizing reproductive health: despite the availability of misoprostol in some health facilities and pharmacies, low-income and rural women continue to lack access not only to the drug, but to quality reproductive health care more generally.

Intravenous Oxytocin versus Intramuscular Oxytocin for the Management of Postpartum Hemorrhage: A Systematic Review and Meta-Analysis

BACKGROUND

Postpartum Hemorrhage (PPH) is one of the primary causes of maternal mortality and morbidity during the third stage of labor. Oxytocin is the gold standard uterotonic agent for the prevention of PPH.

OBJECTIVE

We aimed to compare the efficacy of oxytocin administered Intramuscularly (IM) or Intravenously (IV) for the preventive management of PPH.

METHODS

We searched six databases for relevant clinical trials evaluating the administration of oxytocin for the prevention against PPH through July 2019. Data on blood loss, PPH (≥500 ml), severe PPH (≥1000 ml), blood transfusion, the change in hemoglobin, the use of additional uterotonics, and the incidence of retained placenta were extracted and pooled in a meta-analysis model using RevMan version 5.3.

RESULTS

Seven studies with a total of 6996 participants were included. IM oxytocin group was associated with higher incidence rates of PPH (≥500 ml) (RR=1.35; p=0.003), severe PPH (≥1000 ml) (RR=1.58; p=0.04), and blood transfusion (RR=2.43; p=0.005). In terms of blood loss, the IV route was superior to the IM route (SMD= 0.15; p=0.00001). However, we observed no statistically significant difference between the two routes regarding the change in Hb (SMD=-0.02; p=0.72) and the use of additional uterotonics (RR=0.96, p= 0.94).

CONCLUSION

IV oxytocin infusion is maybe superior to IM injection for the management of PPH. Further studies with larger sample sizes are still needed to support these findings.

Building Bridges: A Case for Community Health Worker Provision of Misoprostol-Only Abortion in the First Trimester

INTRODUCTION

The consequences of unsafe abortion are devastating to women, their families, and their communities. Medication abortion presents an important alternative to harmful self-induction practices and surgical intervention under questionable circumstances. In settings where mifepristone is unavailable, the use of misoprostol alone is a safe and effective option for terminating an unwanted pregnancy. Studies have demonstrated the safety and efficacy of administration of misoprostol by community health workers (CHW) for indications such as postpartum hemorrhage and treatment of incomplete abortion.

OBJECTIVES

The current study assesses the safety and efficacy of CHW managing misoprostol-only abortion in the first trimester.

METHODS

A retrospective review of clinical files of women who received abortion services in three countries in Latin America between April 2009 and December 2015 included analysis of 173 cases.

RESULTS

In 94% of cases, the pregnancy was terminated without any further intervention. In the remaining cases, clients were referred for manual vacuum aspiration. In four cases, a complication was reported by the provider. In one, the complication was promptly resolved through referral to a higher level of care; in the remaining three, the complication was resolved directly by the provider. In 98% of cases, women reported being satisfied with the treatment they received.

CONCLUSION

This study demonstrates that CHW are able to provide misoprostol-only abortion services to women effectively and safely. The benefits of this model of care also extend beyond the abortion service: CHW are able to offer women a comprehensive range of quality health services, including contraceptive services, increasing access to vital healthcare in areas with few other options.

Neither vaginal nor buccal administration of 800 μg misoprostol alters mucosal and systemic immune activation or the cervicovaginal microbiome: a pilot study

OBJECTIVES

The aim of the study was to assess the extent to which misoprostol alters mucosal or systemic immune responses following either buccal or vaginal administration.

METHODS

This was a prospective, crossover pilot study of 15 healthy, reproductive-age women. Women first received 800 μg misoprostol either via buccal or vaginal administration and were crossed over 1 month later to receive the drug via the other route. Cervicovaginal lavage samples, cervical Cytobrush samples, cervicovaginal swabs, urine and blood were obtained immediately prior to drug administration and the following day. Parameters assessed included urine and cervicovaginal misoprostol levels, whole blood cytokine responses (by ELISA) to immune stimulation with lipopolysaccharide, peripheral blood and cervical lymphocyte phenotyping by flow cytometry, cervicovaginal antimicrobial peptide measurement by ELISA and vaginal microbial ecology assessment by 16S rRNA sequencing.

RESULTS

Neither buccal nor vaginal misoprostol significantly altered local or systemic immune and microbiological parameters.

CONCLUSION

In this pilot study, we did not observe significant alteration of mucosal or systemic immunology or vaginal microbial ecology 1 day after drug administration following either the buccal or vaginal route.

Women's health in women's hands: a pilot study assessing the feasibility of providing women with medications to reduce postpartum hemorrhage and sepsis in rural Tanzania

In rural Africa, deaths from childbirth are common and access to health care facilities with skilled providers is very limited. Leading causes of death for women are bleeding and infection. In this pilot study, we establish the feasibility of distributing oral medications to women in rural Tanzania to self-administer after delivery to reduce bleeding and infection. Of the 642 women provided with medications, 90% of the women took them appropriately, while the remaining 10% did not require them. We conclude that is it feasible to distribute oral medications to rural women to self-administer after delivery.

In-VITRo effect of Ficus deltoidea on the contraction of isolated rat's uteri is mediated via multiple receptors binding and is dependent on extracellular calcium

BACKGROUND

Ficus deltoidea, is a perennial herb that is used to assist labor, firm the uterus post-delivery and to prevent postpartum bleeding. In view of its claimed uterotonic action, the mechanisms underlying plant's effect on uterine contraction were investigated.

METHODS

Adult female SD rats were injected with 2 mg/kg 17β-oestradiol (E2) to synchronize their oestrous cycle. A day after injection, uteri were removed for in-vitro contraction studies. The dose dependent effect of Ficus deltoidea aqeous extract (FDA) on the tension produced by the isolated rat's uteri was determined. The effects of atropine (2×10(-8) M), atosiban (0.5 IU), THG113.31 (10 μM), oxodipine (0.25 mM), EDTA (1 mM), 2-amino-ethoxy-diphenylborate (2-APB) (40 mM) and thapsigargin (1 mM) on the maximum force of contraction (Emax) achieved following 2 mg/ml FDA administration were also investigated.

RESULTS

FDA induced in-vitro contraction of the isolated rat's uteri in a dose-dependent manner. Administration of atropine, atosiban and THG113.31 reduced the Emax with atosiban having the greatest effect. The Emax was also reduced following oxodipine and EDTA administration. There was no significant change observed following 2-APB administration. Thapsigargin, however, augmented Emax.

CONCLUSIONS

FDA-induced contraction of the isolated rat's uteri is mediated via multiple uterotonin receptors (muscarinic, oxytocin and prostaglandin F2α) and was dependent on the extracellular Ca2+. Contraction, however, was not dependent on the Ca2+ release from the internal stores. This in-vitro study provides the first scientific evidence on the claimed effect of Ficus Deltoidea on uterine contraction.

Sublingual misoprostol versus intravenous oxytocin in prevention of post-partum hemorrhage

BACKGROUND

Post-partum hemorrhage (PPH) is the most common direct cause of maternal mortality and timely intervention can save many lives.

OBJECTIVE

To compare the effectiveness of sublingual misoprostol to intravenous oxytocin in preventing post-partum hemorrhage in low risk vaginal birth.

METHODS

One hundred patients with no risk factor for PPH were randomly allocated to receive 600 μg misoprostol administered sublingually or 10 IU of intravenous oxytocin immediately after the delivery of baby. Main outcome measures were post-partum blood loss, drop in hemoglobin in 24 h, duration of third stage of labor, and drug-related adverse effects.

RESULTS

Mean age, parity and gestational age were similar in both groups. Mean blood loss was significantly lower in oxytocin group (114.28 ± 26.75 versus 149.50 ± 30.78 ml; p = 0.00). Drop in hemoglobin was 0.31 ± 0.16 versus 0.49 ± 0.21 g% (p = 0.01) in oxytocin and misoprostol group, respectively. Duration of third stage labor was shorter in oxytocin group (median 5 min, IQR: 4.5-5.5 versus 5.5 min, IQR: 5-6 min, p < 0.01). Although fever and shivering were common adverse effects with misoprostol but were not clinically significant.

CONCLUSION

Intravenous oxytocin is more efficacious than sublingual misoprostol in preventing PPH in institutional deliveries.

Development of a community-based maternal, newborn and child emergency training package in South Sudan

OBJECTIVE

To develop an evidence-based maternal, newborn and child emergency training package for community-based frontline health workers (FHWs) in post-conflict South Sudan.

METHODS

In partnership with the new Republic of South Sudan, a multimodal needs assessment was conducted through purposive sampling, involving key informant interviews, focus group discussions, provider knowledge assessments and facility surveys. Data were analyzed using traditional qualitative techniques and compared with existing training programmes and curricula. These findings informed the development and implementation of the novel training approach.

RESULTS

The needs assessment involved 33 FHWs, eight diverse health facilities in Eastern Equatoria, and stakeholders within 18 governmental and non-governmental organizations. Significant consensus emerged regarding the need for greater capacity among previously untrained FHWs. A maternal, newborn and child health training package was developed that included: (1) a participatory training course taught through a 'training of trainers' approach; (2) nine different pictorial action-based checklists covering basic management and referral of maternal, newborn and child emergencies; and (3) essential setting-appropriate equipment.

CONCLUSION

A novel maternal, newborn and child survival package was developed for previously untrained and illiterate FHWs in South Sudan. It is hoped that this approach will build community-based capacity in resource-limited settings while greater capacity is being developed for facility-based deliveries by skilled birth attendants.

Use of uterine balloon tamponade for control of postpartum hemorrhage by community-based health providers in South Sudan

OBJECTIVE

To determine whether use of uterine balloon tamponade (UBT) for management of uncontrolled postpartum hemorrhage (PPH) by community-based providers in a resource-limited setting could be feasible, effective, and safe.

METHODS

In rural South Sudan, community providers were trained and equipped with a simple UBT device consisting of a catheter, condom, and syringe. Snowball sampling identified cases of UBT use since training. Semi-structured interviews were conducted among community providers, referral facility providers, patients, and patient family members. Interview transcripts were analyzed using qualitative methods.

RESULTS

Thirteen cases were identified and 24 interviews related to community-based UBT use were conducted. Qualitative analysis revealed several major themes. Community providers applied UBT in appropriate clinical situations. UBT was effective for controlling PPH, even among severely ill patients. Referral was difficult and lengthy owing to the austere setting, but simple UBT appeared to mitigate these challenges. Communities had some initial fears, yet ultimately embraced UBT. Equipment and supplies were largely maintained. There was universal satisfaction with UBT among patients, family members, and providers. One death occurred among the 13 cases, although it was probably not attributable to PPH.

CONCLUSION

Training and UBT device provision are simple, affordable, and effective for managing uncontrolled PPH in a resource-limited setting.

Injections during labor and intrapartum-related hypoxic injury and mortality in rural southern Nepal

OBJECTIVE

To estimate the association between unmonitored use of injections during labor and intrapartum-related neonatal mortality and morbidity among home births.

METHODS

Recently delivered women in Sarlahi, Nepal, reported whether they had received injections during labor. Data on breathing and crying status at birth, time to first breath, respiratory rate, sucking ability, and lethargy were gathered. Neonatal respiratory depression (NRD) and encephalopathy (NE) were compared by injection receipt status using multivariate regression models.

RESULTS

Injections during labor were frequently reported (7108 of 22352 [31.8%]) and were predominantly given by unqualified village "doctors." Multivariate analysis (excluding facility births and complicated deliveries) revealed associations with intrapartum-related NRD (relative risk [RR] 2.52; 95% CI, 2.29-2.78) and NE (RR 3.48; 95% CI, 2.46-4.93). The risks of neonatal death associated with intrapartum-related NRD (RR 3.78; 95% CI, 2.53-5.66) or NE (RR 4.47; 95% CI, 2.78-7.19) were also elevated.

CONCLUSION

Injection during labor was widespread at the community level. This practice was associated with poor outcomes and possibly related to the inappropriate use of uterotonics by unqualified providers. Interventions are required to increase the safety of childbirth in the community and in peripheral health facilities. Parent trial registered at clinicaltrials.gov (NCT00 109616).

Misoprostol for postpartum hemorrhage prevention at home birth: an integrative review of global implementation experience to date

Background

Hemorrhage continues to be a leading cause of maternal death in developing countries. The 2012 World Health Organization guidelines for the prevention and management of postpartum hemorrhage (PPH) recommend oral administration of misoprostol by community health workers (CHWs). However, there are several outstanding questions about distribution of misoprostol for PPH prevention at home births.

Methods

We conducted an integrative review of published research studies and evaluation reports from programs that distributed misoprostol at the community level for prevention of PPH at home births. We reviewed methods and cadres involved in education of end-users, drug administration, distribution, and coverage, correct and incorrect usage, and serious adverse events.

Results

Eighteen programs were identified; only seven reported all data of interest. Programs utilized a range of strategies and timings for distributing misoprostol. Distribution rates were higher when misoprostol was distributed at a home visit during late pregnancy (54.5-96.9%) or at birth (22.5-83.6%), compared to antenatal care (ANC) distribution at any ANC visit (22.5-49.1%) or late ANC visit (21.0-26.7%). Coverage rates were highest when CHWs and traditional birth attendants distributed misoprostol and lower when health workers/ANC providers distributed the medication. The highest distribution and coverage rates were achieved by programs that allowed self-administration. Seven women took misoprostol prior to delivery out of more than 12,000 women who were followed-up. Facility birth rates increased in the three programs for which this information was available. Fifty-one (51) maternal deaths were reported among 86,732 women taking misoprostol: 24 were attributed to perceived PPH; none were directly attributed to use of misoprostol. Even if all deaths were attributable to PPH, the equivalent ratio (59 maternal deaths/100,000 live births) is substantially lower than the reported maternal mortality ratio in any of these countries.

Conclusions

Community-based programs for prevention of PPH at home birth using misoprostol can achieve high distribution and use of the medication, using diverse program strategies. Coverage was greatest when misoprostol was distributed by community health agents at home visits. Programs appear to be safe, with an extremely low rate of ante- or intrapartum administration of the medication.

Should oral misoprostol be used to prevent postpartum haemorrhage in home-birth settings in low-resource countries? A systematic review of the evidence

BACKGROUND

Using misoprostol to prevent postpartum haemorrhage (PPH) in home-birth settings remains controversial.

OBJECTIVES

To review the safety and effectiveness of oral misoprostol in preventing PPH in home-birth settings.

SEARCH STRATEGY

The Cochrane Library, PubMed, and POPLINE were searched for articles published until 31 March 2012.

SELECTION CRITERIA

Studies, conducted in low-resource countries, comparing oral misoprostol with a placebo or no treatment in a home-birth setting. Studies of misoprostol administered by other routes were excluded.

DATA COLLECTION AND ANALYSIS

Data were extracted by two reviewers and independently checked for accuracy by a third. The quality of evidence was assessed using Grading of Recommendations Assessment, Development and Evaluation (GRADE) criteria. Data were sythesised and meta-analysis was performed where appropriate.

MAIN RESULTS

Ten papers describing two randomised and four non randomised trials. Administration of misoprostol was associated with a significant reduction in the incidence of PPH (RR 0.58, 95% CI 0.38-0.87), additional uterotonics (RR 0.34, 95% CI 0.16-0.73), and referral for PPH (RR 0.49, 95% CI 0.37-0.66). None of the studies was large enough to detect a difference in maternal mortality, and none reported neonatal mortality. Shivering and pyrexia were the most common side effects.

AUTHOR'S CONCLUSIONS

The finding that the distribution of oral misoprostol through frontline health workers is effective in reducing the incidence of PPH could be a significant step forwards in reducing maternal deaths in low-resource countries. However, given the limited number of high-quality studies in this review, further randomised controlled trials are required to confirm the association, particularly in different implementation settings. Adverse effects have not been systematically captured, and there has been limited consideration of the potential for inappropriate or inadvertent use of misoprostol. Further evidence is needed to inform the development of implementation and safety guidelines on the routine availability of misoprostol.

Misoprostol for the management of postpartum bleeding: a new approach

Excessive postpartum hemorrhage (PPH) is a leading cause of maternal death globally. Current approaches to address PPH at the community level focus on reducing the incidence of PPH, but often fail to address the issue of PPH treatment. Given that institutional delivery is not yet a reality for all women, comprehensive care for excessive bleeding after delivery needs to be available at the community level. A new hybrid model of "secondary prevention"-presumptive treatment for women with more than average blood loss-presents one alternative community-based approach. If shown to be effective and feasible, this approach could support policy changes and avoid the need to provide uterotonics to all women after delivery. This Special Communication discusses some of the benefits and limitations of current community approaches using misoprostol for PPH prevention and explains why it is now opportune to translate clinical knowledge into pragmatic PPH service delivery strategies.

New hope: community-based misoprostol use to prevent postpartum haemorrhage

The wide gap in maternal mortality ratios worldwide indicates major inequities in the levels of risk women face during pregnancy. Two priority strategies have emerged among safe motherhood advocates: increasing the quality of emergency obstetric care facilities and deploying skilled birth attendants. The training of traditional birth attendants, a strategy employed in the 1970s and 1980s, is no longer considered a best practice. However, inadequate access to emergency obstetric care and skilled birth attendants means women living in remote areas continue to die in large numbers from preventable maternal causes. This paper outlines an intervention to address the leading direct cause of maternal mortality, postpartum haemorrhage. The potential for saving maternal lives might increase if community-based birth attendants, women themselves, or other community members could be trained to use misoprostol to prevent postpartum haemorrhage. The growing body of evidence regarding the safety and efficacy of misoprostol for this indication raises the question: if achievement of the fifth Millennium Development Goal is truly a priority, why can policy makers and women's health advocates not see that misoprostol distribution at the community level might have life-saving benefits that outweigh risks?