Final answer:
Hydrocodone, found in Tussigon, is used for pain relief and cough suppression in dogs, functioning as an opiate analgesic and antitussive by altering the brain's response to pain and coughing activity. It is prescribed in various formulations for different medical uses but is not recommended for treating acute cough in children.
Step-by-step explanation:
Tussigon, which contains Hydrocodone, is commonly used for pain relief and cough suppression in dogs (Option B). Hydrocodone is a medication in the class of drugs known as opiate (narcotic) analgesics and antitussives. This drug functions by altering the way the brain and nervous system respond to pain, as well as decreasing activity in the part of the brain that causes coughing. While it has proven effectiveness in humans, it should be noted that its use for acute cough in children is not recommended.
Hydrocodone is available in combination with other ingredients, and various combination products are prescribed for different uses. Some formulations are specified for relieving moderate-to-severe pain, while others are intended for cough suppression. It is important to understand that the prescribing information for hydrocodone details its use for relief of pain and cough in humans and may be similarly used in veterinary medicine for similar indications.