dys·pep·tic /dɪsˈpɛptɪk/

–adjective Also, dys·pep·ti·cal.
1. pertaining to, subject to, or suffering from dyspepsia.
2. gloomy, pessimistic, and irritable.

3. a person subject to or suffering from dyspepsia.

1685–95; dys– + Gk peptikós pertaining to digestion, equiv. to pept ( ós ) digested ( pep– cook, digest + –tos ptp. suffix) + –ikos -ic

—Related forms
dys·pep·ti·cal·ly, adverb
non·dys·pep·tic, adjective
non·dys·pep·ti·cal, adjective
non·dys·pep·ti·cal·ly, adverb

Source: Dictionary.com.

Hence it became the better part of wisdom to die in the full flower of life, since, for example, a rachitic old man, toothless, short-winded and dyspeptic, could never fully enjoy the banquets, songs and nymphs of paradise.

Source: Tales of the Dying Earth by Jack Vance.