With Dacronin hardness is not good may be due to Dacronin on the penis caused by anesthesia, so that the sensitivity of the penis is reduced, resulting in symptoms of bad hardness; may also be itself the existence of erectile dysfunction caused by. If you need to use the drug, you need to use under the guidance of a doctor. Dacronin is a local anesthetic, which has a surface anesthetic effect on mucous membranes. If the patient uses Dacronin, it will cause a local anesthetic effect on the penis, resulting in reduced penile sensitivity and stimulation. Under the action of the drug, there may be poor penile hardness, usually after stopping the use of Dacronin or 2 to 4 hours after the drug, the symptoms will gradually disappear. If you find that the penis hardness is still bad after stopping the medication, it may be related to erectile dysfunction. This is because erectile dysfunction can also cause patients to experience symptoms of insufficient erection hardness. If the hardness is caused by erectile dysfunction, it is recommended that the patient go to the hospital in time. If you need to use medication, you need to use it under the guidance of your doctor.