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Sudafed sounds odd. It is a decongestant. It causes sinuses to drain. An antihistamine is usually used to dry things out. Chlorpheneramine maleate is a common antihistamine and is generic and cheap. Zyrtec is a branded antihistamine and is more expensive. As your local pharmacist which works well without causing problems for someone with a concussion. Benadryl (diphenhydramine) is also effective and can help you sleep.

Ativan (lorazepam) is a benzodiazepine. Many caution against using benzos as they can be hard on an injured brain. Some anticonvulsants are easier on the system. Gabapentin, Keppra, and others have been used successfully.

Are you taking any nutritional supplements to help your brain heal?