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Drug Dosage

Please note - Dosage information listed on the website should be used as a guideline only. Always consult your doctor or healthcare specialist before changing the dosage of any medicines.

See also: Complete Drug Dosage A to Z index

Pediatric Dosage Guides

Use these dosage charts for infants and children under 12 years old.

Dosage Charts (Infants & Children)

More about Dosage and Administration

The dose is the amount of drug taken at any one time. This can be expressed as the weight of drug (e.g. 250 mg), volume of drug solution (e.g. 10 mL, 2 drops), the number of dosage forms (e.g. 1 capsule, 1 suppository) or some other quantity (e.g. 2 puffs).

The dosage regimen is the frequency at which the drug doses are given. Examples include 2.5 mL twice a day, one tablet three times a day, one injection every four weeks.

The total daily dose is calculated from the dose and the number of times per day the dose is taken.

The dosage form is the physical form of a dose of drug. Common dosage forms include tablets, capsules, creams, ointments, aerosols and patches. Each dosage form may also have a number of specialized forms such as extended-release, buccal, dispersible and chewable tablets. The strength is the amount of drug in the dosage form or a unit of the dosage form (e.g. 500 mg capsule, 250 mg/5 mL suspension).

The route of administration is the way the dosage form is given. Common routes of administration include oral, rectal, inhalation, nasal and topical.

The optimal dosage is the dosage that gives the desired effect with minimum side effects.

There are many factors taken into consideration when deciding a dose of drug - including age of the patient, weight, sex, ethnicity, liver and kidney function and whether the patient smokes. Other medicines may also affect the drug dose.

Dosage instructions are written on the doctor's prescription or hospital chart, and on the pharmacy label of a prescribed medicine. Dosage instructions are also found on the packaging and inserts of over-the-counter medicines.

Drug Dosage A-Z Index


A-Hydrocort injection, powder, lyophilized, for solution → Akovaz injection Akten Gel ophthalmic gel → Amrix capsule, extended release Amturnide tablet, film coated → Augmentin tablet, film coated Augmentin Chewable tablets, chewable and powder, for suspension → Azurette tablets


B-Donna Tablets tablet → Bleph-10 ophthalmic solution Blephamide ophthalmic ointment → Byvalson tablet, film coated


C-Nate DHA capsule, gelatin c → Ceftizoxime Ceftolozane / Tazobactam → Cladribine Claforan injection → Coumadin tablet Coumadin Injection injection, powder, lyophilized, for solution → Cytra-3 Oral Syrup syrup


D.H.E. 45 injection, solution → Dextromethorphan / Guaifenesin / Phenylephrine Dextromethorphan / Guaifenesin / Potassium Guaiacolsulfonate → Duexis tablet, coated Dulaglutide → Dyzbac tablet


E-Z Disk tablet → Erenumab Ergocalciferol → Ezogabine


FaBB Tablets tablet → Folic Acid Folinex capsule → Fycompa tablets, oral suspension


Gabapentin → Gynazole-1 vaginal cream


H.P. Acthar Gel injection → Hyzaar tablet, film coated


I3odine Max kit, capsules and solution → IsonaRif capsule Isoniazid → Izba ophthalmic solution


J-COF DHC oral liquid → Jynarque kit


K-Dur extended-release tablets → Kytril tablet, film coated; oral solution


L-Methyl-MC NAC Tablets tablet, coated → Lithostat tablet Livalo tablet, film coated → Lyza Tablets tablet


M-Cresyl Acetate Otic → MetroLotion lotion Metronidazole → Myzilra tablets


Nabi-HB injection → Nizoral Shampoo shampoo Nocdurna tablet → Nystop topical powder