Why Does My Medication Look Different? What a New-Looking Refill Can Mean for Allergies

If your refill is a different color, shape, or size, or has a new code stamped on it, it often means that your pharmacy is now dispensing a different manufacturer’s version of the same medicine. The active ingredient is the same. The inactive ingredients, the fillers, dyes, and coatings that make up the rest of the pill, may not be. For most people that changes nothing. If you have an allergy or intolerance to an ingredient, it is worth two minutes at the counter before you take the first dose.

Why would the same medicine look different?

There can be many different approved generics that can be substituted for one brand-name drug, and the FDA notes that their tablets can look different from one another. Substitution is built into the system: according to the FDA, virtually every state has laws or regulations that encourage the substitution of drug products, to contain drug costs. So the company behind your prescription can change from one fill to the next without anything changing on your prescription.

Each version is allowed to look different. The FDA generally permits minor differences in appearance, such as color, and says those differences do not affect how the medicine works. An FDA consumer brochure from 2003 gave two reasons for the different look: certain inactive ingredients, such as colors and flavorings, may differ, and trademark laws in the US do not allow a generic drug to look exactly like other drugs already on the market.

Same medicine, possibly different ingredients

A new look is a visible sign of an invisible change. The color of a pill comes from its inactive ingredients, so a new color usually means at least part of the recipe is different, and the rest of it may be too. A generic has to match the brand’s active ingredient, strength, and dosage form, but for pills and capsules it does not have to match the brand’s fillers, or another generic’s. Our guide to generic vs. brand-name drugs explains the rules behind that.

Do not just take it, and do not just throw it out

Both reflexes have a cost. Taking an unfamiliar pill without checking skips the one moment where an ingredient problem is easy to catch. Setting it aside is riskier than it sounds. In a 2014 study of people taking generic heart medications after a heart attack, 29% had a change in pill shape or color during the study. The odds of stopping the medication were 34% higher after a change in pill color, and 66% higher after a change in shape.

What to ask at the counter

• “Is this the right medicine and strength?” A quick confirmation protects you whatever the reason for the change. The FDA’s own advice is the same: when in doubt, call your pharmacist.
• “Which company made this version?” The manufacturer, not the drug name, is what determines the inactive ingredients.
• “Can you check its inactive ingredients against my allergy?” Name the specific ingredient or food. A precise question gets a precise answer.
• “Can I get the version I had before?” If you tolerated the earlier version, ask whether they can dispense that one. It depends on what the pharmacy’s suppliers carry, so it may not always be possible, but it is always worth asking.
• Write it down. Keep a note of the manufacturer and NDC number of the version that works for you, and share it with your prescriber so the need is on record.

If you reacted after a switch

The FDA acknowledges that small, allowable differences between products from different companies, such as in certain inactive ingredients, can sometimes feel noticeable to patients. So if something changed for you around the time your pill changed, take it seriously rather than dismissing it.

• Call your pharmacist or prescriber before your next dose, and follow their advice on whether to continue.
• Name the version. Give them the manufacturer, or the imprint on the pill, of the version you reacted to, so that version can be identified and noted for next time.
• Report it to the FDA. The FDA says patients can report side effects and quality issues even if they are not sure the drug caused the problem.

How to check the pill yourself

• Look at the imprint. Federal rules require most tablets and capsules to carry an imprint code that, together with the size, shape, and color, identifies the product and its manufacturer or distributor. That code is the fastest way to confirm what is in the bottle.
• Compare it with the label. Prescribing information usually describes what each version looks like and lists its inactive ingredients. Our guide on how to read a drug label shows where to find both.
• Call the FDA if you are stuck. The FDA’s Division of Drug Information is staffed by pharmacists who can help identify a tablet: 1-855-543-3784, or druginfo@fda.hhs.gov.
• Check the new version in the app. The AllergenMeds app flags ingredients like these in the exact product you look up.

This guide is for education only, not medical advice. Always talk to your doctor or pharmacist before starting, stopping, or switching any medication.