Jardiance (empagliflozin) 25 mg carries a side effect profile nearly identical to the lower 10 mg dose. A meta-analysis of randomized controlled trials found no significant differences between the two doses in drug-related adverse effects, serious adverse events, or events leading to discontinuation. The most common side effects are genital yeast infections and urinary tract infections, both driven by the drug’s core mechanism: it works by flushing excess glucose out through your urine, which creates a sugar-rich environment where infections thrive.
Genital and Urinary Tract Infections
Genital yeast infections are the most predictable side effect. In pooled data from four Phase III trials, 3.6% of patients on the 25 mg dose developed genital infections, compared to just 0.7% on placebo. The risk is substantially higher for women: 7% of women on the 25 mg dose experienced genital infections versus 1.1% of men. Symptoms typically include itching, discharge, and irritation.
Urinary tract infections are also listed as a common side effect, though the pooled trial data suggest the overall UTI rate with empagliflozin isn’t dramatically higher than placebo. That said, some UTIs can become serious. The FDA-approved label warns that cases of urosepsis (a UTI that spreads to the bloodstream) and kidney infections have occurred in patients taking Jardiance, sometimes requiring hospitalization. If you have a history of chronic or recurrent urinary or genital infections, you’re more likely to develop them while on this medication.
Dehydration and Low Blood Pressure
Because Jardiance increases urination, it can lower your fluid volume. This is especially relevant if you also take a diuretic (water pill). In a post hoc analysis of a large heart failure trial, patients on both empagliflozin and a diuretic had a 34% higher rate of volume depletion events compared to those on a diuretic alone. The most commonly reported problems were low blood pressure, fainting, and dehydration. For patients not taking diuretics, this risk was negligible.
Practical signs to watch for include dizziness when standing up, lightheadedness, and feeling unusually thirsty. Staying well-hydrated matters more on this medication than it might otherwise, especially in hot weather or during illness when you’re already losing fluids.
Weight Loss
Jardiance causes modest weight loss, which some people welcome but others don’t expect. In a real-world study, patients on the 25 mg dose lost an average of 1.7 kg (about 3.7 pounds) over six months, representing roughly a 2.6% reduction in body weight. This happens because your body is literally excreting calories as glucose through urine rather than absorbing them.
Ketoacidosis With Normal Blood Sugar
One of the more dangerous side effects is a condition called euglycemic diabetic ketoacidosis. Your body, deprived of glucose by the drug’s mechanism, shifts to burning fat for energy. In some cases this fat breakdown spirals out of control, producing dangerously high levels of acid in the blood. What makes this particularly tricky is that blood sugar levels can remain normal or only mildly elevated, so you or your care team might not immediately suspect ketoacidosis.
Warning signs include nausea, vomiting, abdominal pain, unusual fatigue, loss of appetite, and shortness of breath. Some people notice a fruity smell on their breath. Triggers include surgery, serious illness, infection, prolonged fasting, dehydration, or significant reductions in food intake. People with lower body weight and smaller energy reserves may face higher risk. If you’re scheduled for surgery, your doctor will likely have you stop Jardiance beforehand for this reason.
Kidney Concerns
Acute kidney injury has been reported with Jardiance. The risk rises when the drug’s fluid-depleting effects combine with other stressors on the kidneys, such as illness, fasting, heavy sweating, vomiting, or diarrhea. Taking other medications that affect the kidneys (like certain blood pressure drugs or anti-inflammatory painkillers) also increases vulnerability.
Kidney function should be checked before starting Jardiance. The drug isn’t started if kidney filtration rate is below a certain threshold, and it’s discontinued if kidney function drops too low during treatment. If you’re sick and not eating or drinking normally, temporarily pausing the medication is a common precaution.
Fournier’s Gangrene
This is extremely rare but serious enough that the FDA specifically flags it. Fournier’s gangrene is a rapidly spreading infection of the skin and tissue in the genital or perineal area. It has been reported in patients taking SGLT2 inhibitors like Jardiance, in both men and women, and in people with and without diabetes. Cases have required hospitalization, multiple surgeries, and some have been fatal.
The warning signs are pain, tenderness, redness, or swelling in the genital area, often accompanied by fever or general malaise. This is a medical emergency. If you notice these symptoms, you need immediate evaluation.
How the 25 mg Dose Compares to 10 mg
If you’re wondering whether the higher dose means worse side effects, the answer is generally no. A systematic review and meta-analysis comparing the two doses found no statistically significant difference in overall adverse events, serious adverse events, or discontinuation rates. The odds ratio was essentially 1.0 across all categories, meaning the 25 mg dose doesn’t carry a meaningfully higher burden of side effects than the 10 mg dose. The one exception is that genital infection rates in women were slightly higher at 25 mg (7%) than at 10 mg (6.3%), though both were far above placebo.
Interactions With Diuretics
If you take a loop diuretic or another water pill alongside Jardiance, the combined fluid loss can become clinically meaningful. In the EMPEROR-Preserved trial analysis, patients on both medications experienced volume depletion at a rate of 7.5 events per 100 patient-years, compared to 5.6 in the diuretic-only group. Monitoring daily weight and watching for signs of dehydration (dizziness, dry mouth, dark urine, fainting) becomes more important with this combination. Diuretic doses sometimes need adjustment after starting Jardiance to keep things balanced.