Your doctor will provide instructions on how to properly use Perin Cream and the recommended dosage It is important to read the instructions that accompany the medicine to ensure its correct usage Prior to applying the cream ensure that your skin is clean dry and cool Thoroughly wash your entire body approximately 814 hours after applying the medication In most cases a single application is sufficient to treat the condition However if a second application is necessary wait at least 7 days before reapplying It is possible for itching to persist for a few weeks after treating scabies but this is usually an allergic reaction to dead mites rather than a sign of treatment failure The most common side effects include mild burning stinging or tingling at the application site These side effects are typically mild and not everyone experiences them Before using the cream inform your doctor if you have any skin conditions allergies to medications food or other substances or if you have asthma Although this medicine is generally considered safe it is advisable to consult with your doctor if you are pregnant or breastfeeding for their professional advice