Parenteral preparations refer to drugs using non-oral means of administration. Injectables, such as needles and syringes, are used to deliver a drug into the systemic circulation directly in the veins, muscles, under the skin, or in the tissue. These parenteral formulations are pharmaceutical dosage forms that have strict regulations on being sterile, pyrogen-free, and free from visible particulate matter including reconstituted sterile powders. Solutions, suspensions, emulsions, and gels with APIs intended for administration by injection are usually supplied in vials, ampoules, pre-filled syringes, or pens to facilitate ease of use.