2 doctors weighed in:

I took some benylin (dextromethorphan) extra strength that had already expired. What is this going to do to me?

2 doctors weighed in
Dr. Edward Smith
Neurology
1 doctor agrees

In brief: Nothing bad

After a certain period of time, drugs lose potency.
The rate at which a drug can be expected to "expire" is generally when it reaches 90% of labeled strength. A very few drugs, especially "biologicals", may become toxic. Check with your pharmacist about this. Benylin's ingredients don't become toxic as they age (provided storage requirements such as temperature, sunlight & humidity are maintained).

In brief: Nothing bad

After a certain period of time, drugs lose potency.
The rate at which a drug can be expected to "expire" is generally when it reaches 90% of labeled strength. A very few drugs, especially "biologicals", may become toxic. Check with your pharmacist about this. Benylin's ingredients don't become toxic as they age (provided storage requirements such as temperature, sunlight & humidity are maintained).
Dr. Edward Smith
Dr. Edward Smith
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