An apparatus for delivery of medication to a delivery site within the body of a patient, the apparatus comprising: a drug storage device configured to be implanted within the patient's body, the storage device configured to store a plurality of solid form medication elements, each medication element comprising a drug; means for dissolving or suspending at least one solid form medication element with a body fluid to form a drug solution; and means for delivering the drug solution to the delivery site; wherein the means for dissolving or suspending the at least one solid form medication element to form a drug solution comprises: a flexible delivery member having a proximal and distal end, the proximal end coupled to the drug storage device, the delivery member including a lumen (21 and/or 22) for advancement of the medication element through the delivery member; an advancement member configured to advance the medication element through the delivery member lumen; and a capture chamber coupled to the distal end of the delivery member; the capture chamber including a housing having an interior volume for receiving the medication element, the housing including at least one porous section allowing tissue fluids to enter and exit the chamber; wherein the chamber is configured to i) retain a medication element received from the delivery member; ii) dissolve or suspend the medication element in tissue fluids within the interior volume to form a drug solution; and wherein the means for delivering the drug solution comprise at least one porous section of the capture chamber configured to deliver the drug solution to the delivery site; and wherein the delivery site comprises solid tissue; wherein the at least one porous section further comprises a non-tissue contacting porous section, and a tissue contacting porous section, wherein the tissue contacting porous section has a first porosity and the non-tissue contacting porous section has a second porosity. a drug storage device configured to be implanted within the patient's body, the storage device configured to store a plurality of solid form medication elements, each medication element comprising a drug; means for dissolving or suspending at least one solid form medication element with a body fluid to form a drug solution; and means for delivering the drug solution to the delivery site; a flexible delivery member having a proximal and distal end, the proximal end coupled to the drug storage device, the delivery member including a lumen (21 and/or 22) for advancement of the medication element through the delivery member; an advancement member configured to advance the medication element through the delivery member lumen; and a capture chamber coupled to the distal end of the delivery member; the capture chamber including a housing having an interior volume for receiving the medication element, the housing including at least one porous section allowing tissue fluids to enter and exit the chamber; wherein the chamber is configured to i) retain a medication element received from the delivery member; ii) dissolve or suspend the medication element in tissue fluids within the interior volume to form a drug solution; and