Diphenhydramine (DPH) is an antihistamine and sedative mainly used to treat allergies, insomnia, and symptoms of the common cold. It is also less commonly used for tremor in parkinsonism, and nausea. It is taken by mouth, injected into a vein, injected into a muscle, or applied to the skin... Wikipedia

Manufacturer's Website: Benadryl Gel                                                                                                                   Average retail cost: $191/bottle

Doxepin is used as a cream for itchiness due to atopic dermatitis or lichen simplex chronicus...Wikipedia

Manufacturer's Website: Not Available                                                                                                                   Average retail cost: $608/tube

Doxepin is used as a cream for itchiness due to atopic dermatitis or lichen simplex chronicus...Wikipedia

Manufacturer's Website: Not Available                                                                                                                   Average retail cost: $956/tube