Google Loratadine and search it's side effects. Find out everything you can about it and see if you find a link to your symptoms.

Over my life I have taken a boat load of that stuff among others, so pointing a finger at it for me won't work.

Ugh....:

Loratadine Side Effects in Detail - Drugs.com

Look at nervous symptom......"paresthesia"...never heard of it, but man does it "fit".