Pharmacology Notes
Pharmacology is the branch of medicine and biology concerned with the study of drug actions.
A drug is any substance that, when administered to a living organism, produces a biological effect.
### Importance of Drugs:
- Treatment of diseases
- Prevention of illnesses
- Diagnosis of medical conditions
- Alleviation of symptoms
- Improving quality of life
### Classes of Drugs:
1. **Analgesics** - Pain relievers (e.g., Paracetamol, Ibuprofen)
2. **Antibiotics** - Fight bacterial infections (e.g., Amoxicillin, Azithromycin)
3. **Antipyretics** - Reduce fever (e.g., Aspirin, Ibuprofen)
4. **Antihypertensives** - Lower blood pressure (e.g., Amlodipine, Lisinopril)
5. **Diuretics** - Increase urine production (e.g., Furosemide, Hydrochlorothiazide)
### Antiarrhythmic Drugs:
These drugs are used to treat irregular heart rhythms (arrhythmias). They are classified into four
main classes:
1. **Class I (Sodium Channel Blockers)** - Examples: Lidocaine, Quinidine
2. **Class II (Beta Blockers)** - Examples: Propranolol, Metoprolol
3. **Class III (Potassium Channel Blockers)** - Examples: Amiodarone, Sotalol
4. **Class IV (Calcium Channel Blockers)** - Examples: Verapamil, Diltiazem
Pharmacology is the branch of medicine and biology concerned with the study of drug actions.
A drug is any substance that, when administered to a living organism, produces a biological effect.
### Importance of Drugs:
- Treatment of diseases
- Prevention of illnesses
- Diagnosis of medical conditions
- Alleviation of symptoms
- Improving quality of life
### Classes of Drugs:
1. **Analgesics** - Pain relievers (e.g., Paracetamol, Ibuprofen)
2. **Antibiotics** - Fight bacterial infections (e.g., Amoxicillin, Azithromycin)
3. **Antipyretics** - Reduce fever (e.g., Aspirin, Ibuprofen)
4. **Antihypertensives** - Lower blood pressure (e.g., Amlodipine, Lisinopril)
5. **Diuretics** - Increase urine production (e.g., Furosemide, Hydrochlorothiazide)
### Antiarrhythmic Drugs:
These drugs are used to treat irregular heart rhythms (arrhythmias). They are classified into four
main classes:
1. **Class I (Sodium Channel Blockers)** - Examples: Lidocaine, Quinidine
2. **Class II (Beta Blockers)** - Examples: Propranolol, Metoprolol
3. **Class III (Potassium Channel Blockers)** - Examples: Amiodarone, Sotalol
4. **Class IV (Calcium Channel Blockers)** - Examples: Verapamil, Diltiazem
