Here’s a detailed overview of the different sources of drugs, along with examples from each category:

🌿 1. Plant Sources
Plants are one of the oldest and most abundant sources of medicinal compounds.

1. Leaves- Digoxin, Atropine
2. Flowers- Vincristine, Morphine
3. Fruits- Physostigmine
4. Seeds- Strychnine, Castor oil
5. Roots- Emetine, Reserpine
6. Bark- Quinine, Atropine
7. Stem- Tubocurarine

🐄 2. Animal Sources
Drugs derived from animal tissues, secretions, or organs.

1. Pancreas- Insulin
2. Liver- Heparin
3. Thyroid gland- Thyroxine
4. Cod liver- Cod liver oil (Vitamin A & D)
5. Urine of pregnant women- hCG (Human Chorionic Gonadotropin)

🧫 3. Microbial Sources
Microorganisms produce many antibiotics and biologically active compounds.

1. Penicillium chrysogenum- Penicillin
2. Streptomyces griseus- Streptomycin
3. Bacillus subtilis- Bacitracin
4. Streptomyces venezuelae- Chloramphenicol

4. Mineral/Earth Sources
Drugs obtained from natural minerals and elements.

1. Iron- Ferrous sulfate
2. Iodine- Potassium iodide
3. Magnesium- Magnesium sulfate

🌊 5. Marine Sources
Marine organisms offer unique bioactive compounds.

1. Sponges- Cytarabine (anticancer)
2. Cone snails- Ziconotide (pain relief)

🧪 6. Synthetic and Semi-Synthetic Sources
Drugs created or modified in laboratories.

1. Synthetic- Aspirin, Paracetamol
2. Semi-synthetic- Ampicillin (from penicillin)

🧬 7. Biotechnological/Recombinant DNA Sources
Genetically engineered drugs using DNA technology.

1. Recombinant DNA- Insulin (rDNA origin)
2. Monoclonal antibodies | Trastuzumab (Herceptin) |