Identifying Pills by Color and Shape: What You Need to Know
Color and shape filtering is a secondary identification method used when a pill's imprint code is illegible, worn or absent. While it cannot provide definitive identification on its own, it is a valuable tool for significantly narrowing down the list of candidates when used in combination with any partial imprint information available. For the most reliable identification, always start with our Pill Identifier by Imprint Code tool and use this color and shape tool as a supplement.
Why Color and Shape Alone Are Not Sufficient
The pharmaceutical industry uses a relatively limited palette of approved colorants and a small set of standardised shapes. White round tablets are by far the most common form, and could represent hundreds of different medications. Even more distinctive combinations - such as a blue diamond-shaped tablet - can still match multiple products. The FDA imprint requirement exists precisely because physical appearance is insufficient for reliable identification. That said, combining colour, shape, approximate size and any partial imprint information can dramatically reduce the candidate list to a manageable number that a pharmacist can definitively identify.
Common Color-Shape Combinations and What They Might Be
White round tablets include aspirin, metformin, paracetamol, metoprolol, atenolol, clonazepam 2mg and many others. Yellow round tablets include diazepam 5mg, levothyroxine 100mcg and various multivitamins. Blue round tablets include morphine sulfate 30mg, diazepam 10mg and sildenafil. Pink oval tablets include clopidogrel, paroxetine and some antihistamines. Orange oblong tablets include ibuprofen 800mg and various controlled-release formulations. Green/teal oblong capsules often include fluoxetine 20mg and various antibiotic capsules. For any of these, the imprint is essential to narrow down to the specific drug and dose.
When to Take the Pill to a Pharmacist
Even with combined color, shape and partial imprint filtering, some pills will not be identifiable with certainty online. Take the pill directly to a pharmacist if it has no imprint at all, if the imprint is too worn to read with any clarity, if our search returns too many matches to narrow down, or if you have any concern that the pill may not be what it claims to be. Pharmacists have professional-grade databases, magnification equipment and the clinical training to identify pills you cannot identify yourself. Never take a pill you cannot positively identify. Once identified, use our Drug Interaction Checker to screen for potential interactions with other medications.