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Clark Love & Hutson

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The Nationally Recognized Plaintiffs Litigation Law Firm

Side effect or manufacturing defect: When can you sue in Texas?

On Behalf of | Jan 19, 2026 | Defective Product Litigation |

Taking medication is a matter of trust, and you usually expect it to work as advertised. However, when something goes wrong, you might be wondering if it could just be side effects or if there was a problem with the medication itself. This blog examines the difference between these two and how it could determine if you have a valid legal claim.

What separates a side effect from a manufacturing defect

A side effect is a known, documented reaction that may occur when using a product as directed. Manufacturers must disclose these risks on labels and packaging.

If a medication warns about drowsiness or nausea and you experience those symptoms, that is generally not grounds for legal action. You received proper notice, and the product performed as expected.

A manufacturing defect is different. This occurs when something goes wrong during the production process, resulting in a product that deviates from its intended design.

Think of it this way: if every pill in a batch should contain 10 milligrams of a medication, but your pill contains 50 milligrams due to an error, that is a manufacturing defect.

How the “bad batch” concept applies to your situation

Manufacturing defects are sometimes called “bad batch” issues because the problem affects only a portion of products made during a specific production run. These defects may be caused by:

  • Contamination during the manufacturing process
  • Improper ingredient measurements or formulations
  • Equipment malfunctions or calibration errors
  • Packaging failures that compromise product integrity

When the Food and Drug Administration (FDA) identifies a defective or potentially harmful medication, it typically requests that the manufacturer issue a recall. This is a voluntary action taken by a company to remove the product from the market or warn consumers about potential risks.

What are the limitations under Texas law

There are important limitations to understand before pursuing a claim:

  • You have two years from the date of injury to file a product liability claim
  • Texas has a 15-year statute of repose, meaning you generally cannot sue more than 15 years after the product was sold
  • For pharmaceutical products, manufacturers may have protection if they used FDA-approved warnings

For medications specifically, Texas law provides a rebuttable presumption that manufacturers are not liable for failure-to-warn claims if they followed FDA-approved labeling. This protection generally remains unless the FDA itself finds the manufacturer committed fraud or if the manufacturer promoted the drug for off-label uses that caused the injury.

How you may pursue a legal claim

If you believe a defective product caused your injury, there are several steps you might consider to protect your potential claim.

Documentation is often the most important first step. You may want to keep the product and its packaging if possible. Medical records linking your injury to the product could prove essential later.

Because of the various parties involved, identifying who is responsible can be complex. The manufacturer is typically the primary focus, but distributors and retailers may also share responsibility depending on the circumstances.

In these cases, expert testimony can play a significant role. A lawyer can have a qualified expert examine the product on your behalf and explain how the defect caused your injury.