Final answer:
The most appropriate management for the infant with symptoms consistent with colic is supportive measures, including soothing strategies and caregiver support, rather than medication or changing the formula.
Step-by-step explanation:
The most appropriate management for this 2-month-old infant presenting with symptoms of excessive crying, inconsolability, and gassiness, without apparent illness, vomiting, or diarrhea, is likely option 2, supportive measures. This is because the infant's symptoms are consistent with colic, which is a common condition in infants characterized by periods of intense, unexplained fussiness and crying. Colic typically begins around two weeks of age and usually resolves by three to four months. Supportive measures can include methods such as changing holding positions, providing a soothing environment, gently rocking the baby, and ensuring the baby is adequately burped after feedings. Simethicone (option 1) is sometimes used for gassiness but has not been proven to be effective for colic. Hydrolyzed formula (option 3) is often used for infants with a suspected allergy to cow's milk protein; however, there is no indication of such an allergy based on the provided history. Dicyclomine (option 4) is contraindicated in infants under six months due to the risk of serious side effects. Prone sleeping (option 5) is not recommended as it increases the risk of sudden infant death syndrome (SIDS). It is important to provide reassurance to the caregiver and suggest strategies to help with stress, such as taking breaks and seeking support from family or friends.