✦ In case your dog has been prescribed a combined dose of phenobarbital and potassium bromide, he/she may experience exacerbation. Normally, in such cases, your vet would recommend you to reduce the dosage of either of the two medicines.
The side effects are common to all dogs, and generally disappear within 2 to 3 weeks. If he/she experiences side effects for a longer time, then you must consult your vet immediately.