| Singular | Plural | |
|---|---|---|
| Nominativ | cataplexis | cataplexis, cataplexes |
| Genitiv | cataplexis | cataplexium, cataplexum |
| Dativ | cataplexi, cataplexe | cataplexibus |
| Akkusativ | cataplexim, cataplexem | cataplexeis, cataplexis, cataplexes |
| Ablativ | cataplexi, cataplexe | cataplexibus |
| Vokativ | cataplexis | cataplexes |