I dont like Droncit as you have to use 2 tubes, how pointless is that as many cats dont like it being done
Your other options are going to come from the vet:
advocate and stronghold do roundworm/fleas/earmites but not tapeworm
profender does roundworm/tapeworm
milbemax is a tablet but is much smaller and is now made flavoured, cats upto 4kg need half a one and it treats roundworm/tapeworm.
In theory a cat without fleas shouldnt suffer with tapeworm but as most cats come from bad backgrounds its wise to treat them
Annoying but Droncit spot on only does tape worm. There must be something in roundworm treatments that they have to make it POM
Its hopefully going to change soon