Each drug or procedure that will not heal, not strictly fall under the category of conventional medicine is usually referred to as alternative medicine or alternative therapy. Alternative therapy differs from conventional therapies, not only in home but also in practice. This form of therapy may be due to spiritual beliefs and traditions. Mainstream [...]

Although
complementary therapy and alternative therapies are often used interchangeably, they are two different forms of therapy. You can not blame others for thinking they are using the same resources to understand since a term that means the other, as complementary therapies, alternative therapies, and vice versa.
Complementary Therapy is different from alternative therapy [...]