Tessalon Perles typically carry an expiration date of about two to three years from the date of manufacture, printed on the prescription label or the original packaging. Once that date has passed, there is no guarantee the medication will work as intended or remain safe to take. If you’ve found an old bottle in your medicine cabinet and you’re wondering whether to use it, the short answer is: go by the expiration date on your specific bottle and don’t take it beyond that point.
What the Expiration Date Actually Means
The expiration date on a prescription bottle is the last day the manufacturer guarantees full potency and safety under proper storage conditions. For Tessalon Perles, your pharmacist prints this date on your label based on the manufacturer’s stability testing. After that date, the active ingredient (a cough suppressant related to local anesthetics) can break down, potentially becoming less effective or changing in chemical composition.
The FDA warns that expired medications can lose strength or undergo chemical changes that make them risky. Unlike some medications where reduced potency is merely inconvenient, Tessalon Perles pose a unique concern: the capsules are designed to be swallowed whole, and any degradation of the soft gelatin shell could cause the liquid inside to leak. If the contents contact your mouth or throat, they rapidly numb the tissue, which can trigger choking or airway problems.
Storage Conditions That Affect Shelf Life
Proper storage is critical for getting the full shelf life out of your prescription. Tessalon Perles should be kept at room temperature between 68°F and 77°F, in a tightly closed container, and protected from light. Moisture and heat are enemies of soft gelatin capsules, so the bathroom medicine cabinet (despite the name) is one of the worst places to store them. A bedroom drawer or a kitchen cabinet away from the stove works better.
If your capsules have been exposed to high heat, humidity, or direct sunlight for extended periods, they may degrade faster than the expiration date suggests. In that case, even an “unexpired” bottle might not be reliable.
How to Tell if Capsules Have Gone Bad
Tessalon Perles are small, round, soft gelatin capsules. Inspect them before use, especially if they’ve been sitting for a while. Signs of a compromised capsule include:
- Stickiness or clumping: capsules stuck together suggest moisture damage
- Leaking or wet spots: any liquid on the outside means the shell has been breached
- Unusual softness or deformation: the capsule should hold its shape when gently handled
- Discoloration or cloudiness: changes in color from the original appearance
If you notice any of these, do not take the capsule. A leaking Tessalon Perle is particularly dangerous because the liquid inside causes immediate numbing of the mouth and throat, creating a choking hazard.
Why You Should Not Chew or Dissolve Them
This applies to fresh and near-expiration capsules alike, but it’s worth emphasizing: Tessalon Perles must be swallowed whole. Chewing or sucking on them releases the anesthetic liquid directly into your mouth, which numbs your throat rapidly and can compromise your airway. The FDA label specifically warns that oropharyngeal anesthesia develops quickly if the capsule is broken open before swallowing.
Keep Expired Capsules Away From Children
If you’re holding onto an expired bottle, the most important thing is to keep it out of reach of children. Tessalon Perles are considered a “one pill can kill” medication for young children. Just one or two capsules in a child under age 2 can cause restlessness, tremors, seizures, coma, and cardiac arrest, sometimes within 15 to 20 minutes of ingestion. Deaths have been reported within one hour. The small, round capsules can look like candy to a young child, making this risk especially serious.
How to Dispose of Expired Tessalon Perles
Tessalon Perles are not on the FDA’s flush list, so you should not flush them down the toilet. The recommended disposal method is a drug take-back program. Many pharmacies and police departments host collection events or maintain permanent drop-off bins. If no take-back option is available near you, the FDA recommends mixing the capsules with something undesirable like coffee grounds or cat litter in a sealed bag before placing them in your household trash. Given the danger these capsules pose to children, don’t leave expired bottles sitting around waiting for a convenient disposal opportunity.