Filariasis is a parasitic infection which leads to lymphatic obstruction. Impaired lymph drainage leads to abnormal swelling of the limbs and scrotum, a condition called elephentiasis. Watch this video to find out how this disease is managed. Diethyl carbamazine is the drug of choice and necessitates prolonged administration for effective eradication of the worms. Timeline: 0.00- Introduction 0.56- Causative agent 1.15- Drug limitations 1.55- Pharmacokinetics 2.55- Mechanism of action 2.33- Other uses