The medications you mentioned, Fluvoxin CR (fluvoxamine), Deveniz (desvenlafaxine), and the combination of Placid (flupenthixol and melitracen), are commonly used to treat OCD, depression, and other related conditions. These medications work by affecting certain chemicals in the brain to help improve symptoms. However, the symptoms you described, such as feeling loose in certain body parts, a lack of vitality or energy, and a dull mind with increased sleepiness, could potentially be side effects of the medications you're taking. It's important to discuss these symptoms with your prescribing doctor or psychiatrist as they can evaluate your specific situation and provide appropriate guidance. They may consider adjusting the dosage or changing the medication if necessary. It's also possible that these symptoms could be related to other factors. In the meantime, you can try some self-care strategies that may help improve your well-being. Regular exercise, a balanced diet, sufficient sleep, and engaging in activities you enjoy can contribute to overall mental and physical health. Additionally, practicing relaxation techniques such as deep breathing, mindfulness, or meditation may help alleviate some symptoms.

I can understand sometimes libido become zero on this drugs but try to understand it's all reversible. once u will stop medicine tht will reverse or back to normal your sex life , for ur second query we can adjust dose n add on medicine