Active Pharmaceutical Ingredients

Active Pharmaceutical Ingredients

What an active pharmaceutical ingredient (API) is, how it differs from the excipients around it, and why a single medicine can contain more than one API.

On this page

Also known as API, Active Pharmaceutical Ingredients are portions of any drug, which are active. Thus, depending on the drug’s administered dosage, the reactions and results differ. Certain drugs are comprised of more than one kind of API.

Components of a drug

Any drug is composed of two components or aspects. The first is the actual API or Active Pharmaceutical Ingredients, which is the central ingredient. The second is known as an excipient. This refers to the substance inside the drug or tablet. If it is in syrup form, then the excipient will be the liquid that has been used. Thus, excipients are the inactive or inert substances present inside a drug while the Active Pharmaceutical Ingredients is the chemically active substance, which is meant to produce the desired effect in the body.

Complementary substances for added benefit

Certain Active Pharmaceutical Ingredients are unknown and hence require additional substances, which can work in conjunction with the API to produce the required medicinal effect. For example, in the case of herbal medicines, the API is usually a combination of several mixtures and substances, which when used together become active and act on the body. Thus, in such situations, the Active Pharmaceutical Ingredients are not singular substances but the culmination of several herbs and ingredients.

Strength of API

Manufacturers usually use certain standards and benchmarks of calculation in order to determine the relative strength of Active Pharmaceutical Ingredients inside a medicine or drug. However, the methods of standardizing the strengths of APIs within a medicine differ from one brand to another. While one manufacturer may use a certain standard for evaluating the strength of Active Pharmaceutical Ingredients, another manufacturer may use a different standard altogether.

Herbal medicines prone to bad quality

As described above, in the case of herbal medicines the Active Pharmaceutical Ingredients are a combination of several different substances. According to the particular herbal supplement the active ingredient will differ significantly. Since Active Pharmaceutical Ingredients are used in different proportions for virtually all the herbal medicines, suppliers procure poor quality batches of such Active Pharmaceutical Ingredients. By poor quality, it means that the strength of the API is lesser than what it should be. This automatically entails that the resultant herbal medicine does not combine the full properties of the Active Pharmaceutical Ingredients as it ideally should.

High quality is essential

When contacting Active Pharmaceutical Ingredients suppliers it is essential to ensure high quality of the substances. In addition, the documentation, regulatory compliance, storage of Active Pharmaceutical Ingredients as well as packaging, labeling, repackaging, release and production should all be as per the standards set by the FDA. Client confidentiality is critical and suppliers need to maintain complete confidentiality while dealing with their clients. The supplier should have a suitable system to accept or reject all intermediate materials, raw materials, labeling or packaging materials as per their discretion. All the manufacturing records must be thoroughly evaluated to ascertain all the important process steps have been followed. Only then should the Active Pharmaceutical Ingredients be released.

Erythropoietin

Related topics

AcyclovirAcyclovir (acycloguanosine): the antiviral used against herpes simplex and herpes zoster, the trade names it is sold under, and how it works.AripiprazoleAripiprazole: an FDA-approved antipsychotic used in schizophrenia, bipolar and manic disorders, and how its pharmacological action differs from older drugs.BleomycinBleomycin: a glycopeptide antibiotic used against cancers, squamous cell carcinoma, plantar warts and in pleurodesis, discovered by Hamao Umezawa in 1962.BuprenorphineBuprenorphine: the opioid analgesic with both agonist and antagonist action, used in opioid dependence and sold as Subutex and Suboxone.CandesartanCandesartan: the angiotensin II receptor blocker used in hypertension, the brands it is sold under, and the manufacturers behind them.CarithromycinCarithromycin: the macrolide prescribed for tonsillitis, sinusitis, pharyngitis, pneumonia and bronchitis, and the other infections it is used against.CarvedilolCarvedilol: the beta blocker used in congestive heart failure, how it acts on norepinephrine at the nerve endings, and its trade names.CyclosporineCyclosporine: the immunosuppressant used after organ transplants and in psoriasis, and how it lowers the risk of transplant rejection.DarifenacinDarifenacin: used to reduce contractions of the bladder and urinary tract in overactive bladder, and when it should not be taken.DiltiazemDiltiazem: the benzothiazepine calcium channel blocker used in angina pectoris, hypertension and arrhythmia, and how its vasodilator action works.DrospirenoneDrospirenone: the progestin found in many contraceptive pills, how its structure resembles progesterone, and what that changes.LatanoprostLatanoprost: the topical prostaglandin analogue used in glaucoma and ocular hypertension, and how it lowers intraocular pressure.Olmesartan MedoxomilOlmesartan Medoxomil: used in high blood pressure, and how blocking angiotensin II lets blood vessels relax and widen.The Science Behind Digoxin - Dr. Darren Klugman ExplainsLearn more about digoxin from Dr. Darren Klugman - pediatric cardiologist, including its uses, pharmacological action, and how to manage risks