Take one Lactaid tablet right before your first bite of dairy

Lactaid tablets work by breaking down lactose — the sugar in milk and dairy products — so your body can digest them without gas, bloating, or stomach pain. You swallow the tablet with a sip of water just as you start eating or drinking something that contains dairy. The enzyme inside the tablet begins working when ready in your mouth and stomach.

The timing matters because the enzyme needs to be present when the dairy reaches your digestive system. If you take the tablet after you've already eaten dairy, it won't help with what you've already consumed. If you take it too early — say, 30 minutes before eating — some of the enzyme may be used up before the dairy arrives.

Most people find one tablet is enough for a single meal or snack with dairy. If you're eating a large amount of dairy — a whole pizza, a big bowl of ice cream, or multiple servings of cheese — you may need a second tablet partway through or with a second helping.

Key Takeaways

  • Take one tablet with your first bite of dairy; the enzyme starts working when ready in your mouth and stomach.
  • Timing is critical — the tablet must be present when dairy enters your digestive system, so taking it after eating dairy won't help.
  • One tablet typically covers one meal or snack; larger amounts of dairy may require a second tablet.
  • Lactaid tablets are safe to take with other medications and do not cause side effects because the enzyme is not absorbed into your bloodstream.
  • Store tablets at room temperature in a dry place, and check the expiration date because the enzyme loses strength over time.

How much dairy one tablet covers

A single Lactaid tablet contains enough enzyme to break down the lactose in roughly one serving of dairy — a glass of milk, a cup of yogurt, a slice of cheese, or a scoop of ice cream. The exact amount varies depending on the brand and strength of the tablet you buy. Standard Lactaid tablets are labeled as either regular strength or maximum strength, and maximum strength tablets handle more lactose per dose.

If you're unsure whether one tablet will be enough, start with one and see how you feel. You can always take a second tablet 30 minutes later if you notice symptoms starting. Many people learn through trial and error how much dairy their body can handle with one tablet, and that amount may change depending on what you eat and how much stress you're under.

What to do if you forget to take a tablet before eating dairy

If you've already eaten dairy without taking a tablet, taking one afterward won't reverse what you've already consumed. However, if you're planning to eat more dairy in the same meal or shortly after, taking a tablet now will help with what comes next.

For the dairy you've already eaten, the symptoms — bloating, gas, stomach cramps, or diarrhea — usually appear within 30 minutes to two hours. If you're not experiencing symptoms yet, you may not have eaten enough lactose to trigger them, or your body may tolerate that amount. If symptoms do appear, they typically pass on their own within a few hours. Drinking water, moving around, or using an over-the-counter antacid can help ease discomfort while you wait.

Storage and shelf life of Lactaid tablets

Store Lactaid tablets in a cool, dry place — a kitchen cabinet or bathroom medicine cabinet works well. Keep them away from direct sunlight, heat, and moisture, because the enzyme degrades when exposed to these conditions. Do not store them in the refrigerator or freezer, and do not leave them in a hot car or near a window.

Check the expiration date on the bottle before you use the tablets. The enzyme loses potency over time, so an expired tablet may not work as well as a fresh one. Once you open a bottle, the tablets are good until the printed expiration date, even if you don't use them all. If you have tablets that are past their expiration date, you can throw them away and buy a new bottle.

Lactaid tablets versus lactose-free milk and other options

Lactaid tablets are one way to manage lactose, but they're not the only option. Lactose-free milk and dairy products have already had the lactose broken down for you, so you don't need a tablet. Many people find it easier to straightforward buy lactose-free versions of the products they like — milk, ice cream, yogurt, cheese — rather than remembering to take a tablet every time.

Lactose-free products usually cost a bit more than regular dairy, but the price difference has shrunk in recent years as more stores stock them. If you eat dairy only occasionally, tablets may be cheaper and more convenient. If you eat dairy every day, switching to lactose-free products might save you money and the hassle of remembering the tablet.

Some people also find that their body tolerates certain dairy products better than others — hard cheeses and yogurt often cause fewer problems than milk or ice cream — so you may not need a tablet for everything you eat. Experimenting with different products and amounts will help you figure out what works for your body.

Safety and side effects of Lactaid tablets

Lactaid tablets are safe for most people because the enzyme is not absorbed into your bloodstream — it stays in your digestive system and does its job breaking down lactose. You cannot overdose on Lactaid, and taking more than one tablet at a time will not harm you, though it may be unnecessary if one tablet is enough for the amount of dairy you're eating.

Lactaid tablets do not interact with other medications, so you can take them alongside any prescription or over-the-counter drugs you use. They are safe for children and older adults. The only people who should avoid Lactaid are those with a true milk allergy, which is different from lactose intolerance — a milk allergy is an immune reaction to the protein in milk, not the lactose sugar, and Lactaid does not address that.

Frequently Asked Questions

Can I take Lactaid tablets if I'm pregnant or breastfeeding?

Yes. Lactaid tablets are safe during pregnancy and while breastfeeding because the enzyme stays in your digestive system and is not absorbed into your blood or passed to a baby. If you have questions about any medication or supplement during pregnancy, your doctor or midwife can confirm, but Lactaid is considered safe.

Do Lactaid tablets work for all types of dairy?

Lactaid tablets work for any dairy product that contains lactose — milk, yogurt, ice cream, soft cheeses, cream, and butter. Hard cheeses like cheddar and parmesan have very little lactose, so you may not need a tablet for them. Lactaid tablets do not help with a milk allergy, which is a separate condition.

How long does it take for a Lactaid tablet to start working?

The enzyme begins working as soon as it reaches your mouth and stomach, so you should feel the benefit within minutes of taking the tablet. If you're going to have symptoms from dairy, they usually appear 30 minutes to two hours after eating, so taking the tablet right before you eat gives the enzyme time to work before symptoms would start.

Can I take Lactaid tablets every day?

Yes, you can take Lactaid tablets every day without any harm. Many people take one tablet with each meal or snack that contains dairy. There is no limit to how many days in a row you can use them, and your body will not build up a tolerance to the enzyme.

What's the difference between Lactaid regular strength and maximum strength?

Maximum strength tablets contain more of the lactase enzyme per dose, so they can break down more lactose. If you find that one regular strength tablet doesn't fully prevent symptoms, switching to maximum strength may help. Maximum strength tablets cost a bit more, but you may need fewer of them per day.