class="Serp__item__snippet--34vQF">Silenor (doxepin) is available in 3 mg and 6 mg strength tablets for oral administration. Each tablet contains 3.39 mg or 6.78 mg doxepin hydrochloride, equivalent to 3 mg and 6mg of doxepin, respectively. Chemically, doxepin hydrochloride is an (E) and (Z)...