Hmm, a very complex question. Many drugs can cause some of the symptoms you describe. And potential interactions between different drugs, when these get added to the plan, can make the issues more complex, too.
But if the main problems did not trouble you before the addition of the Venlafaxine, it sounds more like the primary culprit.
I have never prescribed or recommended Venlafaxine. From when it was first introduced, I disliked some of the aggressive marketing of it, and the tendency to minimise it's side effects and potential problems. But it has become very popular and widely used. If one checks the available research, it does sound potentially relevant in your recent added troubles.
And of course like others, it can also cause unpleasant symptoms when withdrawn rapidly rather than gradually.
While a number of antidepressants can cause increased bruising, by affecting blood platelets, Venlafaxine clearly can do this, and is known for this potential. While a number of antidepressants can cause a wide range of skin rashes, again Venlafaxine is well recognized for this potential. And while many antidepressants, especially those of the SSRI family, can often cause nausea, loss of appetite and vomiting, Venlafaxine is notable among these.
The sort of picky eating you describe sounds more likely to be related to psychological factors, including your OCD.
I feel that even a very clever psychiatrist should probably not want to handle such a situation entirely alone. The skin peeling problems should probably be assessed by a good dermatologist, and the bruising, by a haematologist or good specialist physician, and some tests may be in order.
I also believe strongly, based on decades of practical experience, that especially where the overlapping conditions have such obvious and relevant psychological components, it is not wise to seek to treat solely with chemicals, and a psychologist should be asked to assess the broad situation, and may, using such scientifically well proven methods as CBT ( Cognitive-Behaviour Therapy ) be able to contribute greatly to empowering the patient and to achieving better control of the symptoms and related problems.
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