Continuous subcutaneous injections of medication are effective in controlling symptoms of the terminal stage of cancer. Chlorpromazine and levomepromazine occasionally cause skin irritation. We examined all patients who underwent continuous subcutaneous administration of psychotropic drugs (chlorpromazine, levomepromazine, midazolam) at the palliative care unit of our hospital from April 2010 to March 2013, the frequency of adverse skin reactions of Common Terminology Criteria for Adverse Events (CTCAE) v4.0 grade 3 or above. Of the 603 hospitalized patients, 389 (64.5%) underwent continuous subcutaneous administration of one of the three drugs. The frequency of grade 3 or above (ulceration or necrosis) adverse skin reactions was 4 out of 345 chlorpromazine cases (1.2%; 95% CI: 0.0-2.3%), 2 out of 90 levomepromazine cases (2.2%; 95% CI: −0.8-5.2%), and 0 out of 210 midazolam cases (0.0%; 95% CI: 0.0-0.0%). The frequency of serious adverse skin reactions caused by continuous subcutaneous administration of psychotropic drugs was low, suggesting that this treatment is relatively safe for the skin.