An implant having a porous portion with a plurality of interconnected voids for receiving at least one injectable substance such that an injectable substance can elute from the porous portion. A syringe can be inserted into the at least one porous portion for administering the at least one injectable substance into the voids of the porous structure. The implant can be implanted with the at least one porous portion pre-loaded with the at least one injectable substance. The at least one porous portion can be loaded by inserting the syringe into the at least one porous portion after implanting the implant. The porous portion can be re-loaded with the syringe after the at least one injectable substance has eluted from the porous portion or replaced with a different injectable substance.