About this article
Medically reviewed- Written by
- Dr Paul Watson
- Medically reviewed by
- Dr Han Simpson
- Published
- May 27, 2026
- Medical review date
- September 8, 2026
- Evidence searched through
- September 8, 2026
- Next review due
- September 8, 2027
- Intended audience
- General Readers & Patients
- Geographic scope
- Worldwide
- Conflicts of interest
- None declared.
- Funding
- Website Owner
- Report a correction
- Report an error or editorial concern
- Medical disclaimer
- Read the medical disclaimer
You pick up a new Jardiance prescription, fold the pharmacy leaflet into your bag, and then make the mistake almost everyone makes. You search online. Within minutes, you’re reading about a vast array of Jardiance side effects including dehydration, urinary infections, ketoacidosis, and rare surgical emergencies. It’s a lot.
In clinic, this is one of the most common conversations I have. A patient isn’t usually asking for a chemistry lesson. They want to know three practical things. What am I likely to feel? What should I ignore versus take seriously? And when should I temporarily stop taking it?
Jardiance can be a very useful medicine. It’s also a medicine that works in a very specific way, and that mechanism explains most of the side effects people notice. If you understand that part, the rest becomes much less mysterious.
Your Doctor Prescribed Jardiance Now What
Patients often don’t start Jardiance feeling calm and curious. They start it feeling hopeful but uneasy. Maybe your blood sugar has been stubborn. Maybe you have heart failure or kidney disease and your doctor wants more protection. Maybe you’ve already tried other medicines and are tired of guessing what the next one will do.
What I usually tell patients is simple. Don’t judge Jardiance by the length of the warning sheet. Judge it by whether you know how to use it safely.
A typical example is the patient who says, “I took one dose and now I’m peeing more. Is that bad?” Often, that’s not a sign the medication is harming you. It’s a sign the drug is doing what it’s designed to do. The key is knowing when a nuisance stays a nuisance, and when it turns into a warning sign.
Another common question is whether Jardiance is “worse” than similar drugs. Sometimes that comparison is helpful, especially if you’ve also looked into Farxiga dosing. But the more useful question is whether Jardiance fits your body, your kidney function, your infection history, your fluid intake, and your day-to-day life.
Practical rule: The safest patient on Jardiance isn’t the one who memorizes every rare complication. It’s the one who knows the early signs of dehydration, infection, and illness-related trouble.
If you remember nothing else, remember this. Jardiance is a medicine you live with actively. You don’t need to fear it, but you do need a plan for sick days, procedures, and new symptoms.
How Jardiance Works and Why Side Effects Happen
Jardiance, also called empagliflozin, belongs to a group of medicines called SGLT2 inhibitors. The easiest way to understand it is to think of your kidneys as having tiny sugar filters.
Normally, those filters pull glucose back into your bloodstream. Jardiance partially blocks that step. Instead of reclaiming as much sugar, your kidneys let more of it leave through urine.
The sugar and water connection
Sugar doesn’t leave quietly. It pulls water with it. That’s why people often notice more urination, more thirst, and sometimes lightheadedness after starting the medication.
The FDA labeling explains that Jardiance increases urinary glucose excretion and produces osmotic diuresis, and that it “causes intravascular volume contraction,” which helps explain dehydration, dizziness, or a drop in blood pressure, especially in people taking diuretics or those with reduced kidney function, as noted in the FDA-approved Jardiance label update.
That phrase, intravascular volume contraction, sounds technical. In plain English, it means your circulating fluid volume can shrink. If you already run dry because you don’t drink much, take a water pill, sweat heavily, or have kidney disease, the effect can hit harder.
Why infections can happen
The same mechanism creates another trade-off. More sugar in the urine can make the urinary and genital area a friendlier environment for yeast and bacteria.
That doesn’t mean everyone gets an infection. It does mean the side effects aren’t random. If you understand the setup, the pattern makes sense:
- More sugar in urine can raise the chance of genital yeast problems.
- More fluid loss can leave you dizzy, thirsty, or weak.
- Less circulating volume can stress the kidneys in someone who is already vulnerable.
Think of Jardiance as opening a small drain for extra sugar. That’s helpful. But whenever a medicine changes how the kidneys handle sugar and water, you have to respect the downstream effects.
If a side effect feels directly related to urination, thirst, dryness, or infection, that usually matches the drug’s mechanism rather than some mysterious reaction.
The Most Common Jardiance Side Effects
The most common Jardiance side effects are usually the most understandable ones. They follow directly from the kidney effect above. In everyday life, patients most often report more bathroom trips, thirst, and symptoms that suggest a urinary or genital infection.
What shows up most often
In pooled placebo-controlled FDA trials, female genital mycotic infections occurred in 6.1% of patients taking Jardiance, and the FDA label also states that urinary tract infection incidence was increased versus placebo across five trials, according to the FDA prescribing information for Jardiance.
That doesn’t mean every urinary symptom is dangerous. It does mean you should take these symptoms seriously early, before they become bigger problems.
Here’s the table I wish every patient received with the first prescription:
| Side Effect | Typical Incidence | What to Watch For |
|---|---|---|
| Female genital yeast infection | 6.1% in FDA clinical trials | Itching, irritation, redness, discharge, burning |
| Urinary tract infection | Increased versus placebo in FDA trials | Burning with urination, urgency, frequency, pelvic discomfort, cloudy urine |
| Increased urination | Not quantified here, but expected from how the drug works | More daytime bathroom trips, nighttime urination |
| Thirst or dry feeling | Not quantified here, but expected from fluid loss | Dry mouth, wanting to drink more often |
| Dizziness or lightheadedness | Not quantified here, but linked to volume loss | Feeling faint when standing, weakness, unsteadiness |
What these side effects feel like in real life
A yeast infection related to Jardiance often doesn’t begin dramatically. It may start as mild itching or irritation. People sometimes ignore it because they assume it will pass. If symptoms are persistent, uncomfortable, or keep recurring, bring it up promptly. Silence delays treatment more than the medicine does.
A urinary tract infection can also develop subtly. Burning, pressure, or needing to urinate again right after you just went are common clues. The important point is not to dismiss urinary symptoms as “just part of the drug.”
For some related skin and soft tissue symptoms in the genital area, patients sometimes look for visual comparisons online. If that’s part of your concern, our guide on boils on private area pictures may help with general context, though new or painful lesions still need direct medical review.
What usually helps and what doesn’t
Some basic habits do help:
- Hydrate steadily: Don’t wait until you feel wrung out.
- Keep the genital area dry and clean: Moisture and sugar are a bad combination.
- Report symptoms early: Mild infections are easier to treat than advanced ones.
What doesn’t work is trying to “push through” burning urination, repeated yeast symptoms, or worsening weakness while assuming your body will adjust. Adjustment can happen with mild increased urination. It’s not the right strategy for suspected infection.
Serious Jardiance Side Effects You Must Know
Severe reactions are uncommon. Still, a few serious Jardiance side effects deserve immediate respect because delay is what turns a manageable problem into an emergency.
The red-flag problems
One major concern is diabetic ketoacidosis, often shortened to DKA. Patients often think DKA only happens when blood sugar is obviously very high. With SGLT2 inhibitors, that assumption can mislead people. If you have nausea, vomiting, belly pain, unusual fatigue, trouble breathing, or feel acutely unwell, that needs prompt medical attention.
Another serious issue is a severe urinary infection. The FDA has reported postmarketing cases of urosepsis and pyelonephritis requiring hospitalization. If a “simple UTI” comes with fever, flank or back pain, vomiting, or a sharp decline in how you feel overall, don’t sit on it.
A third concern is a dangerous genital infection often referred to as Fournier’s gangrene. Warnings about it are prominent, but the event itself is considered rare, and the practical challenge is knowing who needs urgent evaluation, as discussed in this Healthgrades review of Jardiance side effects.
Symptoms that should send you for urgent care
If you’re wondering whether a symptom is “bad enough,” use this simpler checklist.
- Go to urgent care or the ER for possible DKA if you have vomiting, abdominal pain, breathing trouble, or profound weakness and feel significantly ill.
- Seek urgent evaluation for severe urinary infection if urinary symptoms come with fever, back pain, shaking chills, or vomiting.
- Treat genital or perineal pain as urgent if there is swelling, redness, tenderness, or fever, especially if the area looks rapidly worse.
- Get help for possible dehydration or kidney stress if you become dizzy on standing, can’t keep fluids down, notice dark urine, or your urine output drops.
New genital pain with redness, swelling, or fever is not a wait-and-see symptom.
Serious does not mean common
This is where balance matters. Reading about rare complications can make people stop a useful medicine out of fear. I don’t think that’s the right lesson. The right lesson is that rare problems need fast recognition, not constant panic.
People who tend to get into trouble are often those who explain away symptoms for too long. “I thought it was just a stomach bug.” “I assumed the dizziness was normal.” “I didn’t want to bother anyone about burning.” Those are the stories I hear most often.
Are You at Higher Risk? Vulnerable Populations
Not all patients walk into Jardiance with the same risk profile. Some people need closer monitoring from day one because the medicine’s trade-offs line up with risks they already have.
The people I watch most closely
The first group is people who are more likely to become volume depleted. That includes patients on diuretics, people with limited fluid intake, and those with kidney disease. If your system already runs on the dry side, a drug that increases urinary losses can tip you faster than expected.
The second group is people with a history of recurrent yeast infections or urinary infections. Jardiance doesn’t create that tendency out of nowhere, but it can make an existing tendency more relevant.
The third group includes people with reduced kidney reserve, urinary retention, immunosuppression, or peripheral vascular disease. These aren’t automatic deal-breakers, but they do change how alert you and your clinician should be.
Quick self-check before your next refill
Bring these points to your next visit if any apply:
- You take a water pill: Combining fluid-losing medicines can make dizziness and dehydration more likely.
- You’ve had repeated UTIs or yeast infections: Prior history matters.
- You’re eating or drinking poorly: Even a short stretch of poor intake changes the safety picture.
- You’ve had genital skin problems before: New irritation may need faster attention.
- You have kidney disease or reduced kidney function: The medication’s infection and volume risks matter more in this setting.
For patients trying to tell the difference between irritation, ulceration, and infection in the vulvar area, our article on vulvar ulcers pictures can offer general visual context. It’s not a substitute for an exam if the area is painful, swollen, or worsening.
Why this matters
The goal isn’t to label you as a “bad candidate.” It’s to avoid the false reassurance that everyone’s risk is identical.
A medicine can be right for you and still require extra caution because of your age, kidneys, infection history, or other medications.
That’s normal medicine. It’s tailoring, not failure.
Managing Side Effects and When to Stop Taking Jardiance
This is the question patients usually care about most. Not “Can Jardiance cause side effects?” Yes, it can. The key question is when should I temporarily stop taking it?
When holding the medicine makes sense
Some situations make Jardiance less forgiving. Cleveland Clinic flags dehydration, a low-salt diet, frequent alcohol use, surgery, and prior diabetic ketoacidosis as important considerations for empagliflozin users, and practical guidance often missed by patient resources is that acute illness with vomiting or poor intake, dehydration, low-salt intake, frequent alcohol use, and upcoming surgery are situations where pausing the drug should be considered to help prevent DKA or volume depletion, as noted in the Cleveland Clinic empagliflozin medication guide.
In plain terms, I tell patients to contact their care team about temporarily holding Jardiance if any of these happen:
- You’re vomiting or have diarrhea: You’re losing fluid and may not be able to replace it.
- You can’t eat or drink normally: Poor intake changes the risk balance quickly.
- You’re fasting for a procedure or major surgery: This is a classic time to review whether the drug should be paused.
- You’re becoming dehydrated in hot weather or after heavy sweating: Dizziness, dry mouth, dark urine, and weakness matter.
- You’re drinking alcohol heavily or more often than usual: That can complicate hydration and metabolic stability.
Day-to-day management that actually helps
A few simple habits make a real difference.
| Situation | What usually helps | What usually does not |
|---|---|---|
| Mild thirst or extra urination | Drinking fluids regularly, taking note of timing, standing up slowly | Ignoring symptoms until you feel faint |
| Early yeast symptoms | Prompt treatment discussion, keeping the area dry | Waiting for repeated irritation to become severe |
| Urinary burning or urgency | Contacting your clinician early | Assuming every urinary symptom is harmless |
| Hot weather or low intake | Extra attention to hydration and symptoms | Taking the dose as usual when you’re clearly drying out |
A practical sick-day script
If you wake up with a stomach virus, can’t keep food down, and feel weak, that’s not the day to be casual about Jardiance. Call your clinician’s office and say something like this:
“I’m taking Jardiance, and today I have vomiting, poor intake, and I may be getting dehydrated. Should I hold the medication until I’m eating and drinking normally again?”
That wording gets to the point fast.
Likewise, if you’re scheduled for surgery or a procedure that involves fasting, raise the question before the date arrives. Don’t assume the surgeon, primary care doctor, cardiologist, and pharmacist have all synchronized that plan unless someone has told you.
When to restart
Restarting is less about the clock and more about recovery. In general, the medicine should be discussed again once you are eating, drinking, and clinically stable. If the pause was due to infection, dehydration, or a hospital visit, I’d want the restart plan to be explicit rather than guessed.
The biggest mistake patients make isn’t usually starting Jardiance. It’s continuing it mechanically when their body is sending obvious signals that the context has changed.
Your Health Is a Partnership
Jardiance is one of those medicines that rewards informed use. If you know why you may urinate more, why infection symptoms matter, and when sick days change the rules, the medication becomes much easier to use safely.
The aim isn’t to make you anxious about every sensation. The aim is to help you react appropriately. Mild inconvenience can often be managed. Severe weakness, vomiting, dehydration, fever, or genital pain needs attention.
Bring your own patterns into the conversation. Tell your doctor if you’ve had recurrent UTIs, yeast infections, kidney problems, low blood pressure, or trouble staying hydrated. Ask for a sick-day plan before you need one.
That’s how this medication works best. Not as a pill you take on autopilot, but as part of a clear plan between you and your clinician.
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