Aspirator

Eddie Kaspbrak's aspirator, a plastic squeeze-bottle labeled HydrOx Mist, is the central object of a lifelong medical deception: it contains nothing but water with a dash of camphor, a placebo prescribed by Dr. Handor and filled by Mr. Keene to manage Eddie's psychosomatic asthma. Yet the aspirator's power is real—it becomes a weapon against the supernatural, a symbol of belief's material force, and the instrument of Eddie's final sacrifice.

Identity and Deception

The aspirator is a small plastic squeeze-bottle with a pistol-grip handle and a nozzle, labeled "HydrOx Mist" with the instruction "Administer as needed." Eddie carries it constantly, often clutching it in his hand or keeping it in his back pocket. Mr. Keene, the Center Street Drug pharmacist, reveals to an eleven-year-old Eddie that the medicine is a placebo: "HydrOx, Eddie, is water with a dash of camphor thrown in to give it a medicine taste." The revelation shatters Eddie's trust in his mother, Sonia Kaspbrak, who has colluded in the deception, and in the medical establishment that has prescribed it for four years. Eddie's asthma, Mr. Keene explains, is not physical but mental: "Your lungs don't have asthma; your mind does."

Function and Power

Despite its chemical inertness, the aspirator works. Eddie's asthma attacks are real, triggered by stress and fear, and the act of triggering the aspirator—the taste, the sound, the ritual—calms his throat and allows him to breathe. The placebo effect is so powerful that Eddie cannot give it up even after learning the truth; habit and belief override knowledge. This paradox—a fake medicine that genuinely heals—mirrors the novel's central theme: belief itself generates power. The aspirator's true potency emerges in the confrontation with It. When the Crawling Eye attacks the Losers in the tunnels under Derry, Eddie triggers the aspirator into its gelatinous surface, screaming "BATTERY ACID, FUCKNUTS!" and willing the mist to become corrosive. The Eye recoils, wounded. Later, in the final battle of 1958, Eddie again uses the aspirator as a weapon, shooting its contents into the Spider's eye and down its throat, causing visible damage.

The Final Act

In the 1985 confrontation, Eddie, his arm already broken, runs at the Spider and triggers the aspirator into its remaining eye. The mist sinks in "like a splash of carbolic acid," and the eye begins to run. Eddie then shoves his good arm into the Spider's mouth and triggers the aspirator again, shooting the placebo directly down its gullet. The Spider's jaws close, ripping Eddie's arm off at the shoulder. He dies moments later, cradled by Beverly, his last words a gentle correction to Richie: "Don't call me Eds." The aspirator, the object of his lifelong dependency and shame, becomes the instrument of his heroic self-sacrifice.

Thematic Significance

The aspirator embodies the novel's exploration of belief, power, and childhood. It is a placebo that works, a fake that is real, a weakness that becomes a weapon. Eddie's inability to abandon it even after learning the truth reflects the grip of childhood conditioning and the difficulty of escaping parental control. Yet in the moment of crisis, his belief in the aspirator's power—his willingness to imagine it as acid—transforms it into a genuine force against the supernatural. The aspirator is thus both a symbol of Eddie's entrapment and the tool of his liberation, a mundane object that, through the intensity of childhood faith, becomes extraordinary.