Morphine tablets come in different strengths, and each strength has its own appearance

Morphine tablets are not all the same. The way a morphine tablet looks depends on its strength — how much morphine it contains — and which manufacturer made it. A 15 mg tablet will look different from a 30 mg tablet. A brand-name morphine tablet will look different from a generic version of the same strength. The only reliable way to know what you are holding is to read the imprint on the tablet itself, which is a combination of numbers and letters stamped into the surface.

If you have a morphine tablet and need to identify it, the imprint is your answer. Every legitimate morphine tablet sold in the United States has an imprint. That imprint tells you the strength, the manufacturer, and sometimes the type of morphine (when ready-release or extended-release). You can look up that imprint on a pill identifier website or ask your pharmacist.

Key Takeaways

  • Morphine tablets are imprinted with numbers and letters that identify the strength and manufacturer — the imprint is the only reliable way to identify a tablet.
  • Common morphine strengths are 15 mg, 30 mg, 60 mg, and 100 mg, and each strength typically has a different appearance.
  • Extended-release morphine tablets (MS Contin and generics) are usually round or oval and often larger than when ready-release tablets of the same strength.
  • If you cannot read the imprint clearly, do not take the tablet — ask your pharmacist to identify it for you.
  • Pill identifier websites and your pharmacist can tell you the exact strength and type of any morphine tablet if you provide the imprint.

Common morphine tablet strengths and their typical appearance

Morphine tablets in the United States are usually sold in strengths of 15 mg, 30 mg, 60 mg, and 100 mg. Some pharmacies also stock 10 mg and 200 mg tablets, but these are less common. The strength determines not only how much morphine is in the tablet but also its size and color.

Extended-release morphine tablets (the kind you take once or twice a day) are usually larger and rounder than when ready-release tablets (the kind you take every 4 to 6 hours). Extended-release tablets are often oval or round and may be white, gray, blue, or purple depending on the strength and manufacturer. when ready-release tablets tend to be smaller and may be white, round, or slightly flattened.

The most common extended-release morphine tablet is MS Contin, made by Purdue Pharma. A 30 mg MS Contin tablet is typically round, gray, and imprinted with "MS" on one side and "30" on the other. A 60 mg MS Contin tablet is usually round, blue, and imprinted with "MS" and "60". A 100 mg MS Contin tablet is typically round, purple, and imprinted with "MS" and "100". Generic versions of these tablets look similar but may have different imprints — for example, a generic 30 mg extended-release morphine tablet might be imprinted with "M" and "30" instead of "MS" and "30".

How to read the imprint on a morphine tablet

The imprint on a morphine tablet is a combination of letters and numbers pressed into the surface. It appears on one or both sides of the tablet. The imprint always includes a number that represents the strength in milligrams — for example, "15", "30", "60", or "100". It also includes letters that identify the manufacturer or the brand name.

To read the imprint, hold the tablet up to the light and look at both sides. Write down exactly what you see — the letters, numbers, and the order they appear in. If the imprint is worn or hard to read, use a magnifying glass. Once you have the imprint written down, you can look it up on a pill identifier website such as Drugs.com or Pill Identifier, or you can show it to your pharmacist and ask them to identify the tablet for you.

Do not guess at the imprint or assume you know what a tablet is based on its color or shape alone. Two tablets that look similar may have different strengths or may not be morphine at all. The imprint is the only reliable identifier.

when ready-release versus extended-release morphine tablets

Morphine comes in two main forms: when ready-release and extended-release. when ready-release tablets dissolve quickly and deliver morphine to your bloodstream within 30 minutes to an hour. Extended-release tablets dissolve slowly and deliver morphine over 8, 12, or 24 hours. The two types look different and are not interchangeable.

when ready-release morphine tablets are usually smaller and may be white, round, or slightly oval. They are often imprinted with just a number (the strength) and a single letter or abbreviation. Extended-release morphine tablets are usually larger, rounder, or more oval, and are often imprinted with a brand name or abbreviation plus the strength. For example, an when ready-release 15 mg morphine tablet might be small and white and imprinted with "15" and "M". An extended-release 15 mg morphine tablet (if one exists — 15 mg extended-release is uncommon) would be larger and might be imprinted with "MS" and "15".

If you are unsure whether a tablet is when ready-release or extended-release, do not crush it or chew it. Ask your pharmacist. Crushing or chewing an extended-release tablet can cause too much morphine to enter your bloodstream at once, which can be dangerous.

What to do if you cannot identify a morphine tablet

If you have a tablet you believe is morphine but you cannot read the imprint clearly, or if the imprint does not match any tablet in a pill identifier database, do not take it. Instead, contact your pharmacist. Bring the tablet with you or describe the imprint as accurately as you can. Your pharmacist has access to a complete database of all morphine tablets sold in the United States and can tell you the exact strength, type, and manufacturer.

If the tablet came from a prescription bottle, check the label on the bottle. The label will tell you the strength, the type (when ready-release or extended-release), and the number of tablets you should have. If the tablet does not match the label, ask your pharmacist about it before taking it.

If you found a tablet on the street or in someone else's medicine cabinet, do not take it under any circumstances. You cannot be certain what it is, and taking an unknown tablet can be dangerous.

Generic morphine tablets versus brand-name morphine tablets

Brand-name morphine tablets (such as MS Contin) and generic morphine tablets contain the same active ingredient and the same strength, but they may look different. A brand-name 30 mg extended-release morphine tablet might be gray and imprinted with "MS" and "30", while a generic 30 mg extended-release morphine tablet might be white and imprinted with a different code, such as "M" and "30" or a manufacturer's abbreviation.

Generic tablets are just as effective as brand-name tablets. The difference in appearance is straightforward because different manufacturers use different equipment and different dyes. If your pharmacy switches you from a brand-name morphine tablet to a generic version, the new tablet will look different but will work the same way. If you are concerned about the change, ask your pharmacist to confirm that the new tablet is the same strength and type as the one you were taking before.

Frequently Asked Questions

Can I identify a morphine tablet just by looking at its color and shape?

No. Many tablets look similar, and color and shape alone are not reliable identifiers. Two tablets that are both round and white might be different strengths of morphine, or one might be morphine and the other might be a completely different medication. Always read the imprint to identify a tablet correctly.

What if the imprint on my morphine tablet is partially worn off?

If you can read part of the imprint, write down what you can see and show it to your pharmacist. They may be able to identify the tablet based on a partial imprint, especially if you can also tell them the strength you were prescribed. If the imprint is too worn to read, do not take the tablet — ask your pharmacist for a replacement.

Are all morphine tablets the same size?

No. Extended-release morphine tablets are usually larger than when ready-release tablets. Within extended-release tablets, higher strengths are often (but not always) larger than lower strengths. Size alone is not a reliable way to identify a tablet — always check the imprint.

What does the imprint "MS Contin" mean?

MS Contin is the brand name for extended-release morphine made by Purdue Pharma. "MS" stands for morphine sulfate, and "Contin" refers to the continuous-release mechanism. The imprint will also include a number for the strength, such as "MS 30" for 30 mg or "MS 60" for 60 mg.

Can I look up a morphine tablet imprint online?

Yes. Websites like Drugs.com and Pill Identifier allow you to enter the imprint and will show you the tablet's strength, type, and manufacturer. These tools are free and can be helpful if you need to identify a tablet quickly. However, if you are unsure about the imprint or the result does not match what you were prescribed, ask your pharmacist to confirm.