| Absolute |
| Xeroderma pigmentosum |
| Lupus erythematosus with photosensitivity or positive Ro antibody |
| Pregnancy (category C) |
| Lactation |
| Relative |
| Photosensitivity and/photosensitizing medications |
| History or family history of melanoma |
| History of nonmelanoma skin cancer and/or extensive solar damage |
| Previous treatment with ionizing radiation or arsenic |
| Severe liver, renal, or cardiac disease |
| Young age |
