What Could Possible Side Effects Of Taking Outdated Liquid Cough Medicine Be?

I wouldn't take it at all. Just throw it out. I have some outdated in my cabinet that needs to go. I hang on to it because it was expensive. I know I will never take it because it's outdated. Meds can turn into poisen...Let's both just throw it out :~)

The expiration date of medication would be the final day of that month unless otherwise specified---if the medication date is past i would throw out the medication---expired medicines lose strength and potency---liquid medications usually lose potency faster than solids--conditions are also important---most medications need cool dark dry environment---heat light moisture and humidity can damage medication