Mixing Tadaga 5 mg (which contains Tadalafil) with other ED medications like Sildenafil (Viagra) or Vardenafil (Levitra) is generally not recommended and can be dangerous. These drugs work similarly by increasing blood flow to the penis, and combining them can significantly raise the risk of side effects such as low blood pressure, dizziness, fainting, headaches, or even serious cardiovascular complications. Additionally, combining different ED drugs may not enhance performance and can lead to unpredictable reactions. Always consult a healthcare provider before taking more than one ED medication to ensure safe and effective treatment.