Are there any over-the-counter treatments for laryngomalacia?

No. Tincture of time.Nicknamed infantile larynx. Most laryngomalacia disappears by 12-24 months of age. Stridor may come and go over months depending on your child’s growth and activity level. Very rare severe forms of laryngomalacia require surgery.Prolonged laryngomalacia may persist in weak muscular disorders like cerebral palsy.
No. This condition is congenital and usually self limited in children. Occasionally, the condition produces complicated airway obstruction early in infancy that may require intervention by an ENT or pediatric surgeon. Most often, supportive symptomatic care of upper airway colds will suffice until the soft cartilage in the child's airway firms up and matures. Afterwards, the airway resistence resolves.