The phrase "afraid of the effects" is correct and usable in written English.
You can use it when expressing concern or fear about the consequences or outcomes of a particular situation or action.
Example: "She was afraid of the effects that the new policy would have on employee morale."
Alternatives: "worried about the consequences" or "concerned about the outcomes."
He tells Liz that the anniversary of his father, Jimmy Donaghy, abandoning their family is coming up and he is afraid of the effect it will have on Colleen.
McNish was called upon by Shackleton to make the James Caird seaworthy for the long voyage and was selected as part of the crew, possibly because Shackleton was afraid of the effect he would have on morale if left behind with the other men.
The wrong idea about the triggering factor in the village is still evident they are afraid of mining, the effects of which have not been confirmed and are not too worried about high precipitation, which will be of greater importance in the future (especially during El Niňo).
Pogue was alarmed by this and seemed afraid of what the effects might be when this morally bankrupt generation makes up the entire consumer base.
"I'm very afraid of the bad effects that a law that has good intentions in France can have in other countries," said Frédéric Martel, a writer and broadcast journalist on France Culture, a French radio program.
When the other doctors took the condescending tone with me, belittling me because I was afraid of the side effects of chemo, I didn't buy it.
Traditionally, we are afraid of the side effects of success: decreased hospital use can mean that people are being kept healthier, but we fear that shrinking volumes could mean some neighborhoods lose their hospitals.
They were afraid of the side effects, afraid of getting pregnant without contraception, afraid of the response from their church, and afraid of parent and family reactions.
