The treatment of hard erections in men generally refers to the treatment of erectile dysfunction, and the commonly used drugs in the clinic are type 5 phosphodiesterase inhibitors and androgens. 1. Type 5 phosphodiesterase inhibitors: these drugs are currently the first choice for the treatment of erectile dysfunction, such as sildenafil, vardenafil, tadalafil, avanafil, etc. These drugs generally need to be taken orally 1 to 2 hours before sex, and adverse reactions such as headache, facial flushing, nasal congestion, dizziness, visual anomalies, back pain, and myalgia may occur after use. 2. Androgens: Erectile dysfunction caused by low levels of androgens can be treated with this type of medication, such as testosterone undecanoate gel pills (as well as patches, injections, etc.). All of the above drugs need to be used under the guidance of a doctor, do not use on your own, in order to avoid improper use of drugs, adverse effects.