Mayreau has a small clinic with a nurse for basic medical situations. There is also the Union Island Health Center 20 minutes away by boat. Union Island also has a small pharmacy. For more serious conditions, the closest hospital is on the island of Saint Vincent, a 20 minute flight from Union Island. However, for those situaitons, it would be best to fly to Martinique, Grenada, or Barbados as the hospitals are far better on those islands.