Hydroxycloroquine can give , central nervous system symptoms and may be the cause of drowsiness or hypoglycemia which in turn will make you drowsy as well.Anemia may also be a cause of the symptoms as well. Regarding the excessive sweating you should make note of the time of the day when symptoms appear and please take the temperature.
Please also note that sulfasalazine for rheumatoid arthritis is taken twice a day ( not three times a day).
I advise you to discuss the symptoms with your rheumatologist so he can advise after performing the pertinent test.
Thank you for the question.
Manuela Pedra-Nobre, MD
President, North Jersey Rheumatology Center