NiCad rechargeable battery is a type of rechargeable battery using nickel (IV) oxide and metallic cadmium as electrodes. It can be charged with or without the head of the light in place.

Nicorette nasal spray is used for the rapid relief of nicotine withdrawal symptoms caused by giving up smoking. It contains nicotine. It is a type of medicine known as nicotine replacement therapy (NRT) and is used to help smokers give up the habit.

Nicotine lozenge is an oral variety of NRT. The lozenge comes in the form of a hard candy, and releases nicotine as it slowly dissolves in the mouth. It helps people to stop smoking.

Nicotinic Acetylcholine Receptors are ionotropic receptors that form ligand gated ion channels in cells plasma membranes. They include gamma-amino-butiric-acid, glycine and 5-hydroxytryptamine receptors.

Nipple protectors are made of paper thin, soft, odorless silicone and protect sore or cracked nipples during breastfeeding. These are butterfly shaped to allow baby more contact with breast.

Nitrile Gloves are made of a synthetic polymer formed by combining the monomers acrylonitrile, butadiene and carboxylic acid. Nitrile gloves are used to avoid direct contact with the skin. These gloves are ideal for clinicians who are allergic or sensitive to latex and who perform tasks or procedures involving prolonged exposure to blood, body fluids, chemotherapeutic agents and cleaning solutions. Nitrile gloves are made from a synthetic polymer exhibiting rubber-like characteristics when vulcanized.