Businesses in the pharmaceuticals sector research, develop, manufacture and distribute medicines for human or veterinary use. Their work may include discovering active ingredients, formulating them into tablets, capsules, liquids, creams, injections or other dosage forms, and testing products for quality, safety and consistency. Some businesses produce generic medicines, specialist treatments, vaccines or non-prescription remedies, while others supply ingredients or provide services such as packaging, laboratory testing and contract manufacturing. Pharmaceutical suppliers may sell medicines in bulk to wholesalers, hospitals, pharmacies and other healthcare providers rather than directly to the public. Companies involved in clinical research may organise trials to assess medicines before they are authorised for use.