Inhaled mucolytics: Potassium iodide and acetylcysteine inhaled therapy are often used to help the patient cough up the casts by breaking down the thick mucus formations. Inhaled and oral steroids: If PB is associated with asthma or an infection, inhaled and oral steroids have been shown to be effective. Prognosis
Patients with plastic bronchitis that is being caused due to a co-morbid condition generally have a good prognosis once the underlying disease is treated. Epidemiology
To date, about 420 cases have been reported in the medical literature. Given its unusual nature, the true prevalence of PB is unknown, and it is likely that many patients are undiagnosed. PB does affect patients of all age groups and genders. == References ==
Signs and symptoms
Excessive blinking and spasming of one or both eyes – characterized by uncontrollable eyelid closure of durations longer than the typical blink reflex. The spells of spasming may last for minutes or even hours
Uncontrollable contractions or twitches of the eye muscles and surrounding facial area. Some sufferers have twitching symptoms that radiate into the nose, face, cheeks, and sometimes, the neck area
Dryness of the eyes
Sensitivity to the sun and bright light

Causes
Some causes of blepharospasm have been identified; however, the causes of many cases of blepharospasm remain unknown. Some people with blepharospasm have a history of dry eyes, light sensitivity, and even fatigue. Others report no eye problems before onset of symptoms. Some drugs can induce blepharospasm, such as those used to treat Parkinsons disease, as well as hormone treatments, including estrogen-replacement therapy for women going through menopause. Blepharospasm can also be a symptom of acute withdrawal from benzodiazepines. Prolonged use of benzodiazepines can induce blepharospasm and is a known risk factor for the development of blepharospasm.Blepharospasm may also come from abnormal functioning of the brains basal ganglia. Simultaneous dry eye and dystonias such as Meiges syndrome have been observed. Blepharospasms can be caused by concussions in some rare cases, when a blow to the back of the head damages the basal ganglia.Multiple sclerosis can cause blepharospasm. Treatment
Drug therapy for blepharospasm has proved generally unpredictable and short-termed. Anticholinergics, tranquillizing drugs and botulinum toxin are the mostly used therapeutic options. However serious side effects can be observed as well as failure of therapy.