10 Implantable drug delivery devices injected through a small needle having a drug reservoir and a nanoporous membrane; Nanoporous membranes used in drug delivery devices injected through a small needle for improving medication adherence in the treatment of chronic diseases including, for example, metabolic diseases such as diabetes, obesity or non-alcoholic steatohepatits, and psychological diseases such as Alzheimer's, dementia, sociopathy or psychopathy; miniature long-term drug implants utilizing proprietary implantable drug delivery technology; nanoporous membranes used for improving medication adherence in the treatment of chronic diseases including, for example, metabolic diseases such as diabetes, obesity or non-alcoholic steatohepatits, and psychological diseases such as Alzheimer's, dementia, sociopathy or psychopathy that control the amount and rate of drug released from a drug implant injected through a small needle where the drug reservoir dictates the duration of therapy delivered from the drug implant for treatment of metabolic diseases such as diabetes, obesity or non-alcoholic steatohepatits, and psychological diseases such as Alzheimer's, dementia, sociopathy or psychopathy, and other diseases treated with small drug molecules