Third Doctor comic Tom Osgood Inhalor

Tom uses an inhaler during a UNIT operation. (COMIC: The Heralds of Destruction)

An inhaler was a medical device used by asthmatics.

Both Tom Osgood (COMIC: The Heralds of Destruction) and Petronella Osgood had an inhaler which they had to use when they became scared or excited. (TV: The Day of the Doctor, Death in Heaven)

Petronella Osgood once used her inhaler as a weapon, against a version of herself from a parallel universe. (AUDIO: False Negative)

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