Need to free up my head congestion, but need to study and want to take a ritalin (methylphenidate) as well. can i take ritalin (methylphenidate) and sinutab together?

Should be fine: Stimulants and most cold medicines are fine together. Depending on what you take, you may find yourself feeling a bit shaky, but it is not dangerous. If you are worried, start by taking a lower dose of the cold medicine--or call your doctor and ask what cold medicines are least likely to produce a reaction with the stimulant. Btw, stimulants were first used for nasal congestion.