Today, no one has to choose between suffering with sexual side effects or remaining depressed. It is essential for your husband to continue his medication, or his depression may well recur. The doctor may decide to switch to a different antidepressant that doesn't interfere with your sex life, or to add a second one to lessen these effects. There are solutions, depending on what the problem is. SSRIs, for example, can treat premature ejaculation, though they can also cause erectile dysfunction and absence of orgasm.
Different people respond differently to medications.
It might take some time to find the right one, or the right combination, for your husband, so try to be patient. Urge your husband to communicate clearly with his doctor and to not end his treatment without his doctor's approval. With certain antidepressant medications, release may also be impaired. How the sexual problems express themselves is generally no different whether caused by depression or its treatment. But it's important to identify the cause of sexual problems because there are different ways of treating them.