This is an actual distinction. At present PrEP only means Truvada. Truvada is not effective alone for treating HIV. It would be taken in combination with anothe

This is an actual distinction. At present PrEP only means Truvada. Truvada is not effective alone for treating HIV. It would be taken in combination with another drug. Also, There's a newer alternative to Truvada that is preferred/less toxic for HIV treatment, but is not yet approved for PrEP. To be clear there are many more drugs used for HIV treatment that are not used for PrEP.