Jardiance is taken as one tablet by mouth, once a day in the morning, with or without food. The starting dose is 10 mg, which may be increased to 25 mg if you’re tolerating it well. That’s the core routine, but there are several practical details worth knowing to get the most from this medication and avoid problems.
How Jardiance Works in Your Body
Jardiance belongs to a class of medications called SGLT2 inhibitors. Your kidneys normally filter glucose out of your blood and then reabsorb most of it back into your bloodstream. Jardiance blocks that reabsorption process, causing your body to flush excess glucose out through your urine instead. In practice, this means you excrete roughly 50 to 80 extra grams of glucose per day, which lowers your blood sugar through a mechanism that’s completely independent of insulin.
This glucose-flushing effect also pulls extra water into your urine, which is why hydration matters more than usual when you’re on this medication.
Daily Timing and Food
Take your tablet in the morning. It doesn’t need to be taken with a meal, so you can swallow it first thing with a glass of water if that’s easiest. Consistency matters more than the exact minute. Picking the same time each day helps you remember and keeps the drug level steady in your body.
Because Jardiance increases urination, taking it in the morning rather than at night helps you avoid extra trips to the bathroom while you’re trying to sleep.
What to Do if You Miss a Dose
If you forget a dose, take it as soon as you remember. If it’s already close to the time for your next dose, skip the missed one and take your next dose at the regular time. Never double up to make up for a missed tablet. If you’re unsure whether it’s too late in the day, a good rule of thumb is to skip it if you’re closer to tomorrow’s dose than today’s.
Staying Hydrated
Because Jardiance works by moving glucose and water into your urine, you’ll urinate more frequently than usual, especially in the first few weeks. This makes dehydration a real concern. Drink water consistently throughout the day, and pay extra attention in hot weather, during exercise, or if you’re not eating or drinking normally for any reason. Signs of dehydration include dizziness when standing, feeling lightheaded, or unusually dark urine.
The extra sugar in your urine also creates a friendlier environment for yeast and bacteria, which is why genital yeast infections and urinary tract infections are more common with this medication. Staying well hydrated and maintaining good hygiene can help reduce that risk.
When to Temporarily Stop Taking It
One of the most important things to know about Jardiance is the “sick day” rule. If you develop an illness that causes vomiting, diarrhea, or significant dehydration, or if you’re not able to eat and drink normally, you should temporarily stop taking it. The same applies before a scheduled surgery. The reason is that continuing the medication during these situations raises the risk of a rare but serious condition called diabetic ketoacidosis, where acids build up in the blood to dangerous levels. This can happen even when blood sugar readings look normal, which makes it easy to miss.
Expert consensus recommends resuming the medication within 24 to 48 hours after your symptoms resolve and you’re back to eating and drinking normally. If you’re ever unsure whether to pause, it’s worth a quick call to your prescriber.
Kidney Function and Dosing
Jardiance depends on your kidneys to work, so your kidney function plays a role in whether you can take it and how well it performs. Current guidelines recommend starting the medication when your kidney filtration rate (a number your doctor checks with a blood test called eGFR) is at least 20. If you’re already taking Jardiance and your kidney function drops below that threshold, it’s generally considered reasonable to continue as long as you’re tolerating it, up until the point where dialysis or a transplant becomes necessary.
Your prescriber will likely check your kidney function before starting the medication and periodically afterward. A gradual, small dip in kidney filtration is expected in the first few weeks and usually stabilizes. This early dip is not a sign of kidney damage.
Dose Increases
Most people start at 10 mg. If your blood sugar isn’t reaching target levels and you’re tolerating the medication without issues, your prescriber may increase the dose to 25 mg. Both strengths are taken the same way: one tablet, once daily, in the morning. There’s no need to split tablets or take them more than once a day.