Procaine Hydrochloride is the hydrochloride salt form of procaine, a benzoic acid derivative with local anesthetic and antiarrhythmic properties. Procaine binds to and inhibits voltage-gated sodium channels, thereby inhibiting the ionic flux required for the initiation and conduction of impulses. In addition, this agent increases electrical excitation threshold, reduces rate of rise of action potential and slows nerve impulse propagation thereby causing loss of sensation.

Desloratadine is a tricyclic H₁ antagonist that is used to treat allergies. It is an active metabolite of loratadine.

Digoxin is a medication used to treat various heart conditions. Most frequently it is used for atrial fibrillation, atrial flutter and heart failure.

Diphenhydramine is an antihistamine mainly used to treat allergies. It can also be used for insomnia, symptoms of the common cold, tremor in parkinsonism and nausea.