It is usually given in the form of Intravenous (blood administration), also given in the form of oral pills, intramuscular, spinal, peritoneal, directly into CSF.
A single chemotherapeutic agent may be used or a combination of many drugs may be used at the same time or at different times.
It can be given via intravenous line (through veins), or via Chemoport or PICC line (Peripherally Inserted Central Catheter). You may or may not be able to get admitted for chemotherapy. It is usually administered in day-care (where chemotherapy is administered for a few hours & then patient is discharged) under the supervision of paramedical staff. Chemotherapy may be administered over few seconds, or minutes or hours. It may be given over a period of few days also, depending on the treatment protocols, for which you may have to get admitted. Your doctor (medical oncologist) will decide which form of chemotherapy should be given to you based on age, cancer site, histological type, stage and other parameters.
Some International organizations, such as, NCCN (National Comprehensive Cancer Network), ASCO (American Society of Clinical Oncology), ESMO (European Society for Medical Oncology) publish guidelines & protocols specifying dosage, schedule, method of administration of chemotherapy, duration of administration of chemotherapy etc. based on evidence based medicine. You will receive chemotherapy according to the chemotherapy protocols.
You may receive chemotherapy daily, on alternate days, weekly, twice weekly, monthly or so on. It depends on the chemotherapy protocol (designed by the international organizations or personalized protocols).