Can I bring prescription cream to the US?

Yes, you can bring it; it should be in its original container. See https://help.cbp.gov/app/answers/detail/a_id/67/~/traveling-with-or-mailing-medications-and-medical-devices,-such-as-needles-or:

Prescription medications should be in their original containers with the doctor's prescription printed on the container.  It is advised that you travel with no more than personal use quantities, a rule of thumb is no more than a 90 day supply.  If your medications or devices are not in their original containers, you must have a copy of your prescription with you or a letter from your doctor.  A valid prescription or doctors note is required on all medication entering the U.S.

As it is a cream, you will probably need to comply with the restrictions on carrying liquids and gels in your luggage.

There are certain exemptions for liquid medications, usually along with "baby food":

The EU air safety page says:

The volume restriction does not apply to medicines and baby food.

However, that page links to another page with more details about liquid restrictions, and that describes an exemption for:

liquids which are to be used during the trip for medical purposes or special dietary requirements, including baby food;

It is not clear whether "during the trip" means "until you reach your next destination" or "until you get home again." In other words, if you're traveling to the US, it's not clear whether use that will occur while you are in the US is included.

The Munich airport, for example, is less ambiguous. It specifically considers the needs on the flight, rather than the entire trip, saying:

Medication and special foods (e.g. baby food and meals for diabetics) needed during the flight (including nose sprays, eye drops and insulin) can be taken on board.

Finally, for reference, the US TSA says:

You may bring medically necessary liquids, medications and creams in excess of 3.4 ounces or 100 milliliters in your carry-on bag. Remove them from your carry-on bag to be screened separately from the rest of your belongings. You are not required to place your liquid medication in a plastic zip-top bag.

Here, the restriction is only that the liquid or cream be "medically necessary." This is much more flexible, but still doesn't specify whether it must be medically necessary during the flight or in general. I gather that the usual interpretation is permissive, but that could always change.