Evidence for Primary Care: the latest evidence from the Trip Database

FSRH

What is the impact of GLP-1 agonists on the efficacy of oral contraceptives?

Clinical Bottom Line: Tirzepatide significantly reduces the absorption of oral contraceptives, requiring the use of a barrier method or switching to non-oral contraception for the first 4 weeks of treatment and after each dose increase. Semaglutide does not have a clinically significant effect on oral contraceptive efficacy, though gastrointestinal side effects like vomiting or diarrhoea may still compromise effectiveness. Consistent condom use is recommended if gastrointestinal symptoms occur.

Summary: Tirzepatide reduces oral contraceptive absorption, necessitating additional contraception. Semaglutide has no significant impact, but gastrointestinal side effects may affect effectiveness. Follow “missed pill” rules for vomiting or diarrhoea, and consider non-oral methods if symptoms persist.

Tools for Practice

Does testosterone supplementation benefit healthy men or those with age-related low testosterone?

Clinical Bottom Line: In healthy cis-gender men or those with age-related low testosterone, supplementation modestly increases lean body mass (~1.6 kg) but has no clinically meaningful effect on sexual function, strength, fatigue, cognition, or quality of life. Testosterone does not increase risks of prostate events, myocardial infarction, or stroke, but it may raise risks of pulmonary embolism (0.9% vs. 0.5%) and atrial fibrillation (3.5% vs. 2.4%).

Summary: Testosterone supplementation shows minimal clinical benefits beyond a modest increase in lean body mass. Risks include potential increases in pulmonary embolism and atrial fibrillation. Current guidelines do not recommend testosterone use in asymptomatic men and suggest it may be discussed for age-related low testosterone with sexual dysfunction. Screening should use total testosterone levels from a morning blood draw.

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Clinical Correlations

Is There a Role for Vitamins in the Management of Alcohol Use Disorder?

Clinical Bottom Line: Vitamin deficiencies are common in individuals with alcohol use disorder (AUD), with thiamine and folate supplementation being the most critical for preventing complications like Wernicke’s encephalopathy. Evidence on optimal dosing remains limited and inconsistent, and research on other vitamins like E and C shows potential benefits but lacks definitive guidance. Vitamin supplementation should be tailored to individual deficiencies while avoiding unnecessary over-supplementation.

Summary: AUD is closely associated with vitamin deficiencies, particularly B vitamins like thiamine and folate. Thiamine supplementation is crucial for preventing Wernicke’s encephalopathy, but dosing guidelines vary. Folate supplementation is generally safe and beneficial for those with documented deficiencies. Vitamins E and C show some promise in improving liver function and alcohol metabolism but require further evidence to support routine use. Despite inconsistent guidelines, addressing specific deficiencies is an essential part of AUD management.

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NICE

How should menopause be identified and managed effectively?

Clinical Bottom Line: Menopause management should be individualized, addressing symptoms such as vasomotor, genitourinary, and psychological changes while providing tailored hormone replacement therapy (HRT) or non-hormonal options as appropriate. Shared decision-making is essential, balancing symptom relief with potential risks. Special considerations include bone health, mental health, and the needs of specific groups such as trans men and non-binary individuals.

Summary: The NICE guideline emphasizes personalized care for menopause, including providing comprehensive information on symptoms and management options. HRT remains a cornerstone for symptom relief, though alternatives like cognitive behavioral therapy and non-hormonal treatments are highlighted for certain groups or contraindications. The guideline also covers the role of psychological support, bone health, and contraception during menopause while addressing inclusivity in care recommendations.

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NIHR HTA

How can UTIs be prevented and recognised in care home residents?

Clinical Bottom Line: Preventing and recognizing urinary tract infections (UTIs) in care home residents requires a person-centered, systems-based approach. Key strategies include improving hydration, applying good infection prevention practices, using decision-support tools, and fostering knowledgeable, proactive care teams under strong leadership. These interventions can reduce unnecessary antibiotic use, enhance antimicrobial stewardship, and improve overall care quality.

Summary: This realist synthesis identified nine key factors for effective UTI prevention and recognition in care homes. Strategies such as prioritizing hydration, implementing proactive UTI prevention protocols, and educating staff to challenge assumptions and low-value practices are critical. Leadership and culture within care homes play a significant role in embedding these strategies into routine care. Active staff engagement, supported by decision-support tools and clinical reasoning skills, enhances communication and ensures safe, holistic care. Co-designed interventions and ongoing education further reinforce these practices, contributing to better health outcomes and antimicrobial stewardship.

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Ann Rheum Dis

Which strategy is more effective for glucocorticoid withdrawal in rheumatoid arthritis with low disease activity: hydrocortisone replacement or prednisone tapering?

Clinical Bottom Line: In patients with rheumatoid arthritis (RA) in low disease activity (LDA), a hydrocortisone replacement strategy was not superior to a prednisone tapering strategy for glucocorticoid discontinuation. Both strategies achieved similar success rates (55% vs. 47%) without differences in disease flares, additional glucocorticoid use, or patient-reported outcomes.

Summary: The STAR trial compared hydrocortisone replacement and prednisone tapering strategies for glucocorticoid withdrawal in RA patients with LDA. At 12 months, the success rates for discontinuation were comparable between groups, with no significant differences in secondary outcomes such as disease activity or adverse events. These findings suggest either strategy can be used, emphasizing individualized approaches to tapering glucocorticoids.

AHRQ

Do behavioral interventions effectively prevent migraines in adults and children?

Clinical Bottom Line: Behavioral interventions, particularly cognitive behavioral therapy (CBT), relaxation training, and mindfulness-based therapies, may modestly reduce migraine frequency and disability in adults. Evidence in children and adolescents suggests some benefit from multicomponent interventions combining CBT, biofeedback, and relaxation training. However, most trials are underpowered and carry a high risk of bias, necessitating further rigorous research.

Summary: This systematic review evaluated randomized trials of behavioral interventions for migraine prevention in adults and children. In adults, low-strength evidence supports the effectiveness of CBT, relaxation training, and mindfulness-based therapies for reducing migraine frequency and improving disability. In children and adolescents, multicomponent interventions combining CBT, biofeedback, and relaxation training may reduce attack frequency and disability. Methodological limitations, including small sample sizes, high risk of bias, and variability in interventions, highlight the need for standardized, adequately powered studies.

Tools for Practice

Do antidepressants effectively reduce pain in fibromyalgia?

Clinical Bottom Line: In patients with fibromyalgia, antidepressants like duloxetine and mirtazapine provide modest pain relief, with around 30% pain reduction in ~50% of patients compared to ~35% on placebo over 7–14 weeks. SSRIs and amitriptyline also appear effective, but evidence is more limited. Adverse effects are generally tolerable, except for higher doses of duloxetine, which are associated with increased withdrawal rates.

Summary: Antidepressants, particularly duloxetine (60–120 mg daily) and mirtazapine (30 mg daily), reduce pain in fibromyalgia, with NNTs of 8–9 for achieving a 30% reduction in pain compared to placebo. SSRIs and amitriptyline (25–50 mg daily) also show effectiveness, although evidence is less robust. Adverse events are common but usually do not lead to treatment discontinuation, except with high-dose duloxetine. While evidence supports their use, antidepressants are best considered alongside non-pharmacological therapies like exercise and cognitive behavioral therapy.

EAACI

What are the best strategies for managing IgE-mediated food allergies?

Clinical Bottom Line: The EAACI guidelines recommend allergen avoidance, dietary management, and emergency preparedness (including adrenaline auto-injectors) as key components of managing IgE-mediated food allergies. Emerging treatments such as oral, sublingual, and epicutaneous immunotherapy show promise, particularly for peanut, milk, and egg allergies, with strong recommendations for peanut oral immunotherapy in children and adolescents.

Summary: Management of IgE-mediated food allergies focuses on avoiding allergenic foods, maintaining a balanced diet, and equipping patients and caregivers with emergency action plans, including adrenaline auto-injectors. Allergen-specific immunotherapy is recommended for eligible patients, particularly oral immunotherapy for peanut allergy in children, which has strong evidence for desensitization. Psychological support may benefit patients experiencing significant anxiety. The guidelines emphasize a personalized, multidisciplinary approach and highlight the need for further research into disease-modifying treatments.

RNAO

How can diabetic foot ulcers be prevented, assessed, and managed effectively?

Clinical Bottom Line: Diabetic foot ulcers (DFUs) can be effectively prevented and managed through regular screening, patient education on self-management, comprehensive wound assessment, and the involvement of specialized wound care teams. Individualized care plans incorporating virtual care can enhance access to services and support better outcomes.

Summary: The guidelines emphasize regular foot screening based on risk stratification and engaging patients in tailored self-management strategies to prevent DFUs. Comprehensive wound assessments and documentation are critical for ongoing management. Specialized wound care teams are recommended to improve care delivery, while virtual care can supplement in-person services for increased accessibility. These strategies aim to reduce complications and improve quality of life for individuals with diabetes.

Pediatrics

Is dual therapy with acetaminophen (paracetamol) and ibuprofen more effective than monotherapy for fever in children?

Clinical Bottom Line: For short-term management of fever in children, dual therapies (alternating or combined acetaminophen and ibuprofen) are more effective than acetaminophen alone in achieving afebrile status at 4 and 6 hours. High-dose ibuprofen alone is comparable to dual therapies in efficacy, and all strategies have similar safety profiles within the first 6 hours.

Summary: This network meta-analysis of 31 trials involving 5009 children compared acetaminophen, ibuprofen, and dual therapies (alternating or combined) for fever management. Dual therapies were superior to acetaminophen alone in reducing fever at 4 and 6 hours. High-dose ibuprofen was comparable to dual therapies, but acetaminophen alone was inferior to ibuprofen at 4 hours and similar at 6 hours. No significant differences in adverse events were observed among the treatment strategies, suggesting all are safe for short-term use.

Clinical Correlations

How effective are diet and lifestyle interventions in improving health outcomes?

Clinical Bottom Line: Lifestyle counseling remains a cornerstone of chronic disease prevention and management, despite systemic and logistical barriers. Evidence demonstrates its effectiveness in improving diet, physical activity, and reducing key health risks, but widespread implementation is hindered by time constraints, insufficient provider training, and patient-level socioeconomic challenges. Integrating lifestyle medicine into medical education and addressing structural inequities are essential to unlocking its full potential.

Summary: Lifestyle counseling effectively reduces risks associated with obesity, hypertension, and cholesterol, offering measurable public health benefits. However, its implementation is limited by insufficient training for healthcare providers, brief clinic visits, and systemic barriers like food insecurity and lack of green spaces. Emerging lifestyle medicine programs show promise by combining patient education with structural support, such as access to healthier food options. While adjunct therapies like GLP-1 agonists enhance outcomes, they cannot replace the foundational role of lifestyle interventions in addressing chronic disease and health inequities.

MHRA

What are the risks and considerations for GLP-1 receptor agonist use, including potential misuse?

Clinical Bottom Line: GLP-1 receptor agonists (GLP-1RAs) are effective for managing type II diabetes and obesity but carry risks such as gastrointestinal side effects, hypoglycemia (in non-diabetic users), and less common complications like pancreatitis and gallstone disease. These risks underscore the importance of medical supervision and patient education. Reports of misuse, including for aesthetic weight loss, highlight the need for vigilance and adherence to licensed indications.

Summary: GLP-1RAs, including liraglutide, semaglutide, and dulaglutide, are valuable in treating diabetes and obesity but may cause common gastrointestinal issues (e.g., nausea, vomiting) that can lead to severe dehydration and hospitalizations if unmanaged. Misuse for off-label weight loss is concerning, as benefits and risks in non-indicated populations are unstudied. Patients should be educated on side effects, proper hydration, and signs of complications. Adverse drug reactions, including hypoglycemia, should be monitored, and healthcare providers are encouraged to report suspected misuse through the Yellow Card scheme.

NICE

How should endometriosis be diagnosed and managed according to NICE's updated guidelines

Clinical Bottom Line: Endometriosis is a chronic, estrogen-dependent condition that can significantly impact quality of life, causing pain, fatigue, and infertility. Early recognition of symptoms, appropriate imaging, and a multidisciplinary approach are critical for timely diagnosis and treatment. Management includes a combination of pharmacological, surgical, and non-pharmacological interventions tailored to individual needs, preferences, and fertility goals. Updates emphasize improved diagnostic pathways, shared decision-making, and advanced imaging techniques.

Summary: The NICE guideline on endometriosis highlights the importance of early diagnosis and tailored management to improve quality of life and fertility outcomes. Key recommendations include using transvaginal ultrasound as the primary diagnostic tool, supported by MRI or laparoscopy when necessary. Management strategies combine NSAIDs, hormonal therapies, and surgical interventions based on symptom severity and individual preferences. Multidisciplinary care is essential for complex cases, ensuring coordinated support for physical, emotional, and reproductive health. The guideline emphasizes reducing diagnostic delays, personalized care, and addressing the significant impact endometriosis has on patients’ lives.

Tools for Practice

Do combined oral contraceptives (COCs) improve outcomes in premenopausal women with heavy menstrual bleeding caused by benign conditions?

Clinical Bottom Line: COCs effectively reduce menstrual blood loss in about 80% of women compared to 40% with placebo, and they also decrease sanitary product usage by half and improve hemoglobin levels. Quality of life measures are also significantly improved with COCs compared to placebo. However, levonorgestrel-containing intrauterine devices (IUDs) are more effective than COCs in reducing blood loss and achieving treatment success. Adverse effects and patient satisfaction are similar between COCs and IUDs.

Summary: In premenopausal women with heavy menstrual bleeding of benign etiology, COCs significantly reduce mean blood loss, improve hemoglobin, and enhance quality of life when compared to placebo. However, levonorgestrel IUDs remain the superior treatment option for blood loss reduction and treatment success, with no differences in patient satisfaction. COCs are contraindicated in women with thromboembolism, uncontrolled hypertension, and other risk factors, and their use carries a small increased risk of venous thromboembolism. Although COCs are effective, clinicians should consider IUDs as the first-line option due to their superior efficacy.

Diabetes Obes Metab

Are patients with newly diagnosed frozen shoulder at increased risk of developing type 2 diabetes?

Clinical Bottom Line: Patients newly diagnosed with frozen shoulder have a significantly higher likelihood of being diagnosed with type 2 diabetes compared to those without frozen shoulder. Over a follow-up period of 15.8 years, 5% of frozen shoulder patients were diagnosed with type 2 diabetes versus 0.28% of matched controls, yielding a hazard ratio (HR) of 19.4. This association remained strong (HR 20.0) even after adjusting for potential confounding factors such as consultation frequency, hyperlipidemia, hypertension, obesity, and socioeconomic status.

Summary: This UK-based cohort study highlights a robust association between frozen shoulder and an increased risk of subsequent type 2 diabetes. The findings suggest that frozen shoulder may serve as an early clinical marker for identifying individuals at higher risk of diabetes, warranting further investigation into the utility of screening for type 2 diabetes in this population.