Difficulties producing saliva after Botox injections, will I experience the same problem?

It's been 6 months since I had a few units of Botox injected into my forehead for the first time. The following hours after the consultation I noticed I produced very little amounts of saliva which led to difficulties swallowing. This situation continued until the next day, when I started to feel better and I was totally recovered in a 20 hours time lapse. Currently, the aesthetic effects have already disappeared, so, will I experience the same problem if I get it reinjected? Thank you