Yes, you can cut most Cialis tablets in half, but only certain strengths and only with your doctor's approval
Cialis tablets come in 2.5 mg, 5 mg, 10 mg, and 20 mg strengths. The 10 mg and 20 mg tablets are scored—they have a line down the middle—which means they are designed to be split. The 2.5 mg and 5 mg tablets are not scored and should not be cut because the dose will not divide evenly and you cannot control how much medication you actually take.
Even if your tablet is scored, you should not cut it without talking to your doctor first. Your doctor needs to know you are splitting doses because they prescribed a specific strength for a reason. Cutting a tablet changes how you are taking the medication, and your doctor may need to adjust your overall plan or monitor you differently.
If you are cutting tablets to save money, tell your doctor that too. There may be a lower-strength tablet available that costs less, or your insurance may cover a different dosing schedule that works better for your budget.
Key Takeaways
- Only Cialis tablets marked with a score line (10 mg and 20 mg) are designed to be cut in half.
- You must get your doctor's permission before splitting any tablet, even if it is scored.
- Unscored tablets (2.5 mg and 5 mg) should never be cut because you cannot divide the dose accurately.
- If cost is the reason you want to split tablets, ask your doctor about lower-strength options or different dosing schedules that your insurance may cover.
How to safely cut a scored tablet
If your doctor approves splitting your tablet, use a pill cutter—a small device designed specifically for this purpose. A pill cutter has a blade and a holder that keeps the tablet steady while you cut. You can buy one at any pharmacy for a few dollars, and it is much more reliable than using a knife or scissors.
Place the tablet in the pill cutter with the score line aligned with the blade. Press down firmly and evenly. The tablet should split into two roughly equal halves. If the tablet crumbles or does not split cleanly, stop and ask your pharmacist for help. A damaged tablet may not contain the right dose.
Store the cut halves in a clean, dry place. If you are not using the second half right away, keep it in the original bottle or a small sealed container. Do not leave cut tablets sitting out or exposed to moisture, because the medication can break down.
Why some tablets cannot be cut
Unscored tablets are made with the medication distributed throughout the entire tablet. When you cut an unscored tablet, you do not get two equal halves—you might get 40 percent of the dose in one piece and 60 percent in the other. This means you cannot know how much medication you are actually taking, which defeats the purpose of a prescribed dose.
Scored tablets are manufactured differently. The score line is built into the tablet during production, and the medication is distributed so that each half contains the correct dose. That is why the score line matters—it is not just a line drawn on top.
What to do if you cannot afford your current dose
If you are thinking about cutting tablets because of cost, your first step is to talk to your doctor or pharmacist. They can tell you whether a lower-strength tablet would work for you, or whether a different dosing schedule might be covered differently by your insurance.
Some insurance plans cover 5 mg daily doses more affordably than 20 mg doses taken as needed. Your doctor may also know about patient information programs from the manufacturer, or they may be able to prescribe a generic version that costs less. Generic tadalafil (the active ingredient in Cialis) is often cheaper than the brand name.
Your pharmacist can also check whether a different pharmacy in your network has a better price. Prices vary between pharmacies, and switching where you fill your prescription sometimes saves money without changing your medication at all.
When to call your doctor or pharmacist
Call your doctor if you have cut a tablet and then feel dizzy, have chest pain, have vision changes, or notice any other unusual symptoms. These could mean the dose is not right for you. Do not wait to see if the symptoms go away on their own.
Call your pharmacist if a scored tablet does not split cleanly, if you are unsure whether your tablet is scored, or if you have questions about how to store cut tablets. Your pharmacist can show you how to use a pill cutter correctly and can answer questions about your specific medication.
If you are taking other medications or have heart problems, kidney problems, or liver problems, make sure your doctor knows before you start splitting doses. These conditions can affect how your body processes the medication, and splitting a tablet might not be safe for you.
Frequently Asked Questions
Will cutting a Cialis tablet in half change how well it works?
If the tablet is scored and you cut it correctly with a pill cutter, each half should contain the right dose and work the same way. If the tablet is unscored or you cut it unevenly, you may not get the dose you need, and it may not work as expected. Always use a pill cutter and get your doctor's approval first.
Can I cut a 5 mg Cialis tablet in half to make a 2.5 mg dose?
No. The 5 mg tablet is not scored and is not designed to be cut. If you need a 2.5 mg dose, ask your doctor to prescribe the 2.5 mg tablet instead. Cutting an unscored tablet will not give you an accurate dose.
How long can I keep a cut Cialis tablet before taking it?
Keep cut tablets in a clean, dry container in the same conditions as whole tablets—away from heat, light, and moisture. Most tablets stay stable for as long as whole tablets do, but ask your pharmacist about the specific storage time for your medication. If a cut tablet looks discolored or damaged, do not take it.
Is generic tadalafil cheaper than brand-name Cialis if I buy the higher strength and cut it?
Sometimes. Generic tadalafil is usually less expensive than brand-name Cialis, but buying a higher strength to cut may not always be cheaper than buying the exact dose you need. Ask your pharmacist to compare prices for you, because it depends on your insurance and your local pharmacy.