When there is a possibility that the short-term effects of a particular drug will trigger a toxic reaction, then this drug is identified as having what level of toxicity?

Acute.

Explanation:

The drugs are the chemicals used for the treatment of the particular diseases. The drugs should be administered in the prescribed dose by the doctor to the patient.

The drugs can also be classified on the basis of the time they show effect whether the drug has long time effect or the sort time effect. The action of the drug for the short time only is known as the acute level of toxicity and has the ability to show the toxic reaction in the body.

Thus, the answer is acute.