From personal experience today (spouse getting second dose of Moderna), the nurse explicitly suggested using Tylenol to handle fever in case it occurs.

Here is a quote from https://www.cdc.gov/vaccines/covid-19/info-by-product/clinic...:

Management of post-COVID-19-vaccination symptoms

For all currently authorized COVID-19 vaccines, antipyretic or analgesic medications (e.g., acetaminophen, non-steroidal anti-inflammatory drugs) can be taken for the treatment of post-vaccination local or systemic symptoms, if medically appropriate. <ellipsis>

I'm not worried about blunted immune response because I've taken heaps of asprin when I had COVID-19 (it might be why I got tinnitus for close to 6 months afterwards -- that or the antibiotics) and I mean grams per day and I had very high antibodies levels afterwards.

(Not a doctor) From listening to the "Faucis" of various countries (incuding the original): I believe that the vaccine is not a watered down virus, so technically you are not making yourself vulnerable/more sensitive to the virus. It is suppsed to 'teach' your body how to build the defence.

Only the Chinese virus is a 'watered down' version of the virus. All the others (including the Russian) is an RNA-type-thingie.