Goals from Derek Doyle, Daryl Kavanagh, Danny North and Anthony Murphy gave St Patrick's Athletic their third Airtricity Premier Division win over Drogheda United this season.
Doyle's shot started the scoring on three minutes at Richmond Park with Kavanagh heading the next goal in the 50th minute.
Drogheda had Dave Rogers sent off on 64 minutes before North scored on the rebound after Stephen Trimble saved his penalty.
Murphy's excellent low and hard drive rounded off the night's scoring nine minutes before the end.
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