These free B.Pharm notes on dosage forms cover chapter 7 of General Pharmacy, a first-semester subject. Read the key points below, then study the complete chapter PDF. You can browse every chapter in the General Pharmacy category.
Table of Contents
Read the following document for full information
Chapter overview
A drug is rarely given in its pure form. This chapter introduces dosage forms and the routes by which they are given. It classifies routes into local routes (topical, deep tissue, intra-arterial) and systemic routes (enteral and parenteral), compares onset of action and first-pass metabolism, and classifies dosage forms by physical state and by route of administration.
Key points on dosage forms
- A dosage form is the final physical form in which a drug is presented for use, such as a tablet, syrup, ointment or injection.
- Local routes act at the site of application, while systemic routes deliver the drug into the circulation.
- Enteral routes include oral, sublingual and rectal; parenteral routes include intravenous, intramuscular and subcutaneous injections.
- Onset of action, first-pass metabolism and ease of self-administration differ between routes.
- Dosage forms are classified as solid, semisolid, liquid or gaseous, and also by their route of administration.
Relevance to pharmacy practice
Choosing the right dosage form and route decides how fast a drug acts, how much reaches the site of action and how well the patient will comply with treatment.
Every chapter in this subject builds on the one before it, so do not skip topics that look simple. Definitions, classifications and official examples are the parts that examiners return to most often, and a clear understanding here will also make later subjects such as pharmaceutics and pharmacology much easier to follow in the coming semesters.
Frequently asked questions
What is a dosage form?
It is the physical form of a medicine, such as a tablet, capsule, solution or cream, that contains the active drug and excipients.
What is first-pass metabolism?
It is the loss of drug in the liver or gut wall before the oral dose reaches the systemic circulation.
How are dosage forms classified?
They are classified by physical state into solid, semisolid, liquid and gaseous forms, and by route of administration.
Quick revision checklist
Use this self-test after reading the chapter on dosage forms. If you can do all of the following without looking at your notes, you are ready for the exam.
- I can explain: the meaning of drug and dosage form
- I can explain: local and systemic routes
- I can explain: enteral and parenteral routes
- I can explain: the comparison of common routes
- I can explain: classification of dosage forms
Study and exam tips
Start by reading the chapter once for the overall idea, then revise dosage forms using headings, definitions, classifications and examples. Short-answer questions in the university exam usually ask for definitions, advantages, disadvantages and examples, so write these in your own words and practise drawing tables and flow charts where the chapter has them.
For wider reading, standard textbooks and open resources such as the NCBI Bookshelf help you confirm terms and see more worked examples. Revise dosage forms again a day later and again a week later, because spaced revision improves long-term memory.
This page is part of the General Pharmacy series for first-semester B.Pharm students on B.Pharm Guru, where every chapter has a short summary and a full PDF. Bookmark this page and share it with classmates who are preparing for the same exam.
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