I wouldn't hesitate to use it. What else can doctors prescribe? Most of the ear nfections are treated with antibiotics - antifungal- steroid ear drops. In very bad cases of otitis oral antibiotics are used. But I think she most probably has just local external ear infection. And leaving dog for 3 days with sore ear is more dangerous than using drops without prescription.
P.s.
ahaha, I'm a moronI thought you are talking about Daphne
still, despite many doctors would roll their eyes, I've checked ingredients and concentrations - you can use it, I can guarantee you 99% it is safe for humans
the only thing, if there is pain in the ear in humans, it is quite often otitis (in dogs it is more often you can presume just skin nflammation) and otitis usually requires oral antibiotics, you cannot usually treat it only with ear drops. And the pain is growing fast and soon becomes quite unbearable.