Hi there, I noticed you asked for a phone call and unfortunately I am not set up to take phone calls at this time. I am more than happy to help you via this chat thread though.
Klonopin or clonazepam as is it known by its generic name is ***** ***** very often in dogs, however I did find dose in Plumb's Veterinary Drug Handbook of 0.1 – 1 mg/kg by mouth once as needed or twice daily. This translates to about 0.05mg to 0.5mg per pound. That being said, however we rarely use this medication in dogs and it has the potential to cause side effects such as excitability, sedation, or ataxia (trouble walking). Other side effects that may be possible usually come with longer term use. There are other drugs that are approved for use in dogs and one new one is called Sileo (dexmedetonidine oral gel). This is available by prescription only from your vet and has been developed as a product that can be used for dogs that experience noise aversion. This is a veterinary approved product and is specifically for your dog's problem. I recommend discussing this with your veterinarian. Trazodone is another medication that I have personally used for anxiety in dogs and this works quite well, especially in conjunction with other methods of calming.
Other things that can be done to help an anxious dog include wearing a specially designed shirt called a thunder shirt. This is designed to be snug and to reduce anxiety by causing the release of calming neurotransmitters and giving your dog a sense of security. These are available at pet stores and online in different sizes for different sized dogs.
You can also try a holistic product called Rescue Remedy. This is a bach flower essence that can be used as needed to provide a calming feeling and reduce situational anxiety. This can be ordered online or is available in certain health food stores.
There is a product called DAP which stands for dog appeasing pheremone and this is the chemical that mothers produce to tell their puppies that they are safe. This comes in a spray or in a collar that can be worn to help your dog feel safe.
In the meantime, if you have an area of the house such as a basement that is quieter, I recommend putting your dog there for the time being. This will reduce her anxiety as she will be less able to hear the thunder. Have I been able to answer your question satisfactorily?