My husband had his left lobe removed last year, and his instructions were very similar to what Dot.Calm stated, especially in regards to cold/flu remedies, but with one exception: aspirin may not necessarily be off-limits, depending upon the patient. In my husband's case, he was put on aspirin within 48 hours of his surgery as he normally takes Enteric 325mg for cardiac therapy. Individual's medical needs vary greatly and so may the medications, so it's indeed wise (and necessary) to check every medication with the providing physician.
This pertains to liver transplant patients; they must not take aspirin or nonsteroidal inti-inflammatory drugs (NSAIDS) at any time due to the risk of kidney damage. Common NSAIDS to avoid are Motrin, Ibuprofen, Advil, Aleve, and Naprosyn. Any cold medication or decongestants containing pseudoephedrine or other decongestants should be avoided unless your doctor has given permission. Tylenol for headache or pain - not for fever - can be taken not to exceed 1800mg in 24 hrs. Consult with your surgeons office for additional screens.