Topical pain preparations are suitable for most people, and may be particularly useful for those who have a sensitive digestive tract or difficulty swallowing. They also allow you to apply the medication exactly where it hurts. Topical pain medications may not be suitable for broken or raw skin or on very large surface areas.  Patients who have allergies or sensitivities to any of the prescription components should not use these medications. As with any prescription, you should tell your healthcare provider and pharmacist about all other prescription, over-the-counter medications, and supplements you use so that they can screen for possible drug interactions.  Talk to your doctor if you are pregnant or nursing a baby. Your pharmacist will advise you about possible side effects.