What cause you to have sciatica?

yes.

The cause of this pain is the neuropathy defined by the inflammation and swelling of the large sciatic nerve that originates from the exit of an intervertebral nerve plexus between one of the large...

I have taken Cialis 4 times. Twice it was followed by a day or two of sciatica.

Typically. bilateral damage to L4-L5 vertebrae, ruptured disc(s) at this location, osteophytes or reduction in both foramen diameter, inflamation etc.

Yes , sciatica can produce the feeling of having "Pins and Needles" in the part that is affected by this condition ~ look to the related link below for additional information regarding this condition...