Trimethoprim-sulfamethoxazole (TMP/SMX) may be used in those with allergies to first-line agents or in infants who have a risk of pyloric stenosis from macrolides.A reasonable guideline is to treat people age >1 year within 3 weeks of cough onset and infants age <1 year and pregnant women within 6 weeks of cough onset. If the person is diagnosed late, antibiotics will not alter the course of the illness, and even without antibiotics, they should no longer be spreading pertussis. When used early, antibiotics decrease the duration of infectiousness, and thus prevent spread. Short-term antibiotics (azithromycin for 3–5 days) are as effective as long-term treatment (erythromycin 10–14 days) in eliminating B. pertussis with fewer and less severe side effects.People with pertussis are most infectious during the first two weeks following the onset of symptoms.Effective treatments of the cough associated with this condition have not been developed. The use of over the counter cough medications is discouraged and has not been found helpful. Prognosis
While most healthy older children and adults fully recover, infection in newborns is particularly severe. Pertussis is fatal in an estimated 0.5% of US infants under one year of age. First-year infants are also more likely to develop complications, such as: apneas (31%), pneumonia (12%), seizures (0.6%) and encephalopathy (0.15%). This may be due to the ability of the bacterium to suppress the immune system. Epidemiology
Worldwide, whooping cough affects around 16 million people yearly. One estimate for 2013 stated it resulted in about 61,000 deaths – down from 138,000 deaths in 1990.
For the purposes of this article, then, a "fugue state" occurs while one is "acting out" a "dissociative fugue". The DSM-IV  defines "dissociative fugue" as:

sudden, unexpected travel away from home or ones customary place of work, with inability to recall ones past
confusion about personal identity, or the assumption of a new identity
significant distress or impairmentThe Merck Manual  defines "dissociative fugue" as:

One or more episodes of amnesia in which the inability to recall some or all of ones past and either the loss of ones identity or the formation of a new identity occur with sudden, unexpected, purposeful travel away from home.In support of this definition, the Merck Manual  further defines dissociative amnesia as:

An inability to recall important personal information, usually of a traumatic or stressful nature, that is too extensive to be explained by normal forgetfulness. Prognosis
The DSM-IV-TR states that the fugue may have a duration from days to months, and recovery is usually rapid. However, some cases may be refractory. An individual usually has only one episode. Cases
Shirley Ardell Mason (1923–1998), also known as "Sybil", would disappear and then reappear with no recollection of what happened during the time span. She recalled "being here and then not here" and having no identity of herself; it was claimed by her psychiatrist, Cornelia Wilbur, that she also had dissociative identity disorder. Wilburs diagnosis of DID was disputed by Wilburs contemporary Herbert Spiegel.