Personally, I don’t advise starting any drug therapy without a diagnosis. A murmur is merely a description of a “whishing” noise when the heart beats. This observation may be potentially serious, or not at all.
The best next diagnostic step is to have an echocardiogram performed. This will tell you if there really is any reason to treat further.
For truly asymptotic patients I start [url=https://www.homevet.com/how-homeopathy-can-help]homeopathic treatment[/url] (which needs to be strictly individualized), modify lifestyle, and monitor closely before any drugs.