Ans: The overdose symptoms of Trental might include the following.  ⦿ Fever. ⦿ Agitation. ⦿ Drowsiness, ⦿ Fainting. ⦿ Flushing, such as a tingly feeling, redness, or warmth.  Seizure.  In case you think that you might have overdosed, seek emergency medical attention or call the poison helpline.