When it comes to the subject of casting out demons, we are prone to fall into the ditch on either side of the road, either downplaying something that is entirely scriptural, or finding demons behind every bush. As with all biblical topics, the truth is found in the middle of the extremes.
Certainly casting out demons is not a subject we should ignore. It was a regular feature of Jesus’ ministry (see Mark 1:32-34, 39; Luke 4:41; 6:18; 7:21). Moreover, He commissioned the twelve to cast out demons, and they were generally quite successful, bringing deliverance to many suffering people (see Mark 6:12-13; Luke 10:17; Acts 5:16; 8:7; 19:12). Beyond that, there was at least one person during Christ’s ministry who cast out demons in His name whom He had not specifically authorized (see Mark 9:38-39). There are also records in the book of Acts of many people being delivered from unclean spirits through the ministry of the apostles (see Acts 5:16; 8:6-7; 16:16-18; 19:11-12). Finally, one of the signs that Jesus said would follow believers is that they would cast out demons (see Mark 16:17). So the exorcism of demons was not something that was only for the early church.