Hello, LoSam! How are you?

When did it expire?

Doubling up wouldn't be advisable, because if it is still effective, that may result in far too much sedation and depression of the central nervous system, which could put in you danger, due to lowered heart rate and blood pressure.

Concerning Hydroxyzine’s estimated shelf life, the following analysis performed by Spectrum Chemical denotes a timeframe of 60 months (5 years) from the date of manufacture. Albeit, they go on to state that the actual assigned shelf life for any specific lot should be referenced on the Certificate of Analysis: spectrumchemical.com/media/tech-statements/Technical_Documents_Section_HY125.pdf

Read more on Hydroxyzine here: MedlinePlus

Hope this helps!