Vitamin D, Gabapentin, UTI Treatment, and Intermittent Fasting: Practice-Changing Insights

Vitamin D, Omega-3s, and Physical Performance

• 💡 A substudy of the VITAL trial found that neither vitamin D3 nor omega-3 fatty acids improved physical performance measures like grip strength, walking speed, or balance in generally healthy older adults over two years.
• ⚠️ While vitamin D has a strong public image, recent negative trials have created confusion among clinicians regarding its efficacy for preventing falls.
• 📈 Some subgroup analysis suggested that individuals with normal or higher baseline vitamin D levels might have performed worse on the timed get-up-and-go test when supplemented.
• 📉 Current guidelines recommend checking vitamin D levels primarily for those at risk of deficiency (e.g., institutionalized individuals, those with osteoporosis), not for the average person seeking general health benefits.

Gabapentin vs. Duloxetine for Falls Risk

• 🎯 A new user active comparator study using trial emulation assessed the risk of falls in older adults initiating gabapentin versus duloxetine for neuropathic pain, fibromyalgia, or postherpetic neuralgia.
• ⚖️ The study found a lower hazard ratio for falls in incident gabapentin users compared to duloxetine users, contrary to prior expectations.
• ⚠️ Limitations include a short median follow-up of 30 days (up to 6 months) and a low median starting dose of gabapentin (200 mg/day), which may not reflect real-world, higher-dose usage.
• 🧠 The findings suggest that gabapentin may not increase fall risk compared to duloxetine in this specific population, but caution is advised against overgeneralizing due to dosing and follow-up limitations.

Gepotidacin for Uncomplicated UTI

• 🚀 Gepotidacin, a novel oral antibiotic with a unique mechanism of action inhibiting DNA gyrase and topoisomerase 4, has received FDA approval for uncomplicated UTIs.
• 📊 Two randomized trials (Eagle 2 and Eagle 3) showed gepotidacin to be non-inferior, and in Eagle 3, superior, to nitrofurantoin for treating uncomplicated UTIs in women.
• ⚠️ While adverse events were generally mild and rare, all eight cases of C. difficile infection occurred in patients receiving gepotidacin.
• 💰 The higher cost and comparable efficacy to nitrofurantoin suggest gepotidacin may be reserved for cases with antibiotic resistance or when other oral options are exhausted, rather than first-line use.

Intermittent Fasting for Weight Loss

• 📈 The DRIFT (Daily Restriction vs. Intermittent Fasting Trial) study compared 4:3 intermittent fasting (80% calorie reduction on 3 non-consecutive days) with daily caloric restriction (34% reduction daily) in overweight or obese adults.
• 🎯 Both groups received intensive behavioral support and exercise encouragement; however, the intermittent fasting group experienced greater weight loss (7.6% vs. 5% of body weight) at 12 months.
• ⚖️ While both groups showed improvements in cardio-metabolic risk factors, the intermittent fasting group had a greater loss of lean mass, though also a lower HOMA-IR score.
• 🔑 The study suggests intermittent fasting may be a viable alternative to daily caloric restriction for weight loss, potentially offering better adherence, but generalizability is limited by the intensive behavioral support and specific study population.