162 prospective patients were compared to 172 historical patients. Pill counts correlated well with MEMS data (R=0.498 for 7-day intervals, R=0.872 for intervals >7 days). Treatment completion rates were higher among prospective than historical patients (82.1% vs. 65.1%), primarily due to lower abandonment rates. If you have a sun allergy, your treatment must always begin with the strategies described in the Prevention section. These will reduce your sun exposure and prevent your symptoms from worsening.