Is there a special thikr or amal for anxiety and depression?

Answer

When anxiety develops, do not brood on the past. Do not entertain the thought which is the cause for the anxiety. Instead, lapse into Thikrullah. Perform two raka'ts Nafl and engage in Thikrullah. Shaitaan tries to derail a person by causing anxiety in this manner. A Mu'min equipped with the weapon of Thikr does not suffer depression. Anxiety is an assault of shaitaan, and its antidote is Thikrullah. Rasulullah (Sallallahu alayhi wasallam)

said: "Shaitaan sits glued on the heart of man. When he (man) makes thikr, shaitaan flees. When he (man) is oblivious (ghaafil), shaitaan casts his waswasah."