What is the difference between ic sertraline hcl and regular sertraline?

i got just plain old sertraline from a walgreens pharmacy and when i got my rx from a cvs pharmacy the bottle said ic sertraline hcl instead of only sertraline, and the pills were shaped differently. is there a difference, or is it just the pharmacy or they get them from a different manufacturer?
Update: Oh. Why are they shaped differently?
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