Absolute. My main symptoms of depression are insomnia or sleep deprivation, being quick to fatigue and a very odd fuzzy-head feeling. My main feelings of anxiety are tension, headache, chest pains resembling heartburn (very scary as a hypochondriac) and when it's bad, nausea. Consistently they have got better and worse in line with CBT and other therapies. Medication I have to say made me feel a bit ill, Fluoxetine tablets taste like plastic and for a week I couldn't eat.