Can administration of 30mg phenobarbital cause heart attack in a dog?

Administration of phenobarbital at a dosage of 30 mg is unlikely to cause a heart attack in a dog. Phenobarbital is a medication commonly used in veterinary medicine for its sedative, anticonvulsant, and hypnotic effects. While phenobarbital toxicity can occur, it typically requires much higher doses compared to 30 mg. The toxic dose of phenobarbital in dogs can vary depending on factors such as the dog's weight, age, and overall health. Generally, toxic effects are more likely to occur with dosages exceeding 2 mg per kg of body weight. Therefore, a 30 mg dose is unlikely to cause significant toxicity or lead to a heart attack.