1. "This medicine will not affect my driving". 2. "This medicine will have no effect on my driving". 3. "This medicine is very effective". 4. "This movie has good visual effects".
These words also have other related meanings. Look them both up in a dictionary for details. The defini
What is the word I highlighted in your sentence? :-) That sentence is right, but effect can also be used without on. The rules can be understood and memorised! Have a look at the other thread I linked to.