In {{Infobox drug}}, |type= can be used to add specifics:

| type=combo
| type=mab
| type=vaccine
| type=<!-- single chemical drug; default -->

These categories list the first three options. Together they count for some 10% of the 6000 {{Infobox drug}} articles. The fourth option (drug type = single chemical drug) is not categorized. The single-chemical drugs articles make about 90% of the 6000 {{Infobox drug}} articles (as of January 2016).