How long after taking Tylenol can you take another flu med containing acetaminophen?

You can take 1,000mg acetaminophen a maximum of 4 times in any 24 hour period with a minimum of 4 hours between doses. Theraflu contains acetaminophen so be careful not to overdose as even small acetaminophen overdoses can be fatal.

Tylenol is acetaminophen, every 4 hours. Theraflu will make you constipated. It contains pseudoephedrine which isn't a very beautiful drug to be entirely honest. If you want a stronger acetaminophen then go for tylenol ultra relief, my advice, which is stronger; overall I think it would be better to stick to tylenol alone.

You can take another acetaminophen product after 6 hours, no need to wait 24.

I REALLY recommend that you do what your doctor says. Your doctor probably had +8 years of experience, and knows what they are talking about. They may also be telling you this because the combination of certain medications can lead to big health hazards. If you want to change your course of treatment, get a second opinion and do as they say, don't try to change your treatment plan yourself.

just keep within the max dose for acetaminophen, which is 650 mg every 4-6 hours, and max of 3250 mg per 24 hours.

There are different versions of Theraflu, with the original containing 1000 mg acetaminophen. Newer versions have 650 mg. Check the bottle.

Tylenol comes in various sizes and strengths also, as does Theraflu, so you have to check the bottles, and do some math to determine the safe dose of the combinations. Just stay within the max doses above.