Are there foods or medicines that COVID-19 patients should not take? and why?
The availability of fresh foods may decrease and it may therefore become necessary to rely more on canned, frozen, or processed foods. Many of these foods contain high levels of salt. WHO recommends consuming less than 5 g of salt per day. In order to achieve this, prioritize foods with reduced or no added salt. You may also consider rinsing canned foods such as vegetables and beans, to remove some of the excess sodium. Be aware that pickled foods often contain high levels of sodium too. In many countries, 50–75% of the salt intake comes from the foods we eat, rather than what we add ourselves. Given that you might be consuming enough salt already, avoid adding extra salt when cooking and to your meals at the table. Experiment with fresh or dried herbs and spices for added flavour instead.
Limit your sugar intake
WHO also recommends that ideally less than 5% of total energy intake for adults should come from free sugars (about 6 teaspoons). If you crave something sweet, fresh fruit should always be the priority. Frozen fruits, canned fruits in juice rather than syrup, and dried fruits with no added sugar are also good options. When other dessert options are chosen, ensure that they are low in sugar and consume small portions. Watch out for low fat options, as these are often high in added sugars. Limit the amount of sugar or honey added to foods and avoid sweetening your beverages.
Hope it helps
Limit consumption of processed foods as they are unhealthy. Stick to unprocessed organic food which are healthier and are capable of improving overall health.
Regarding medications it depends on which ones are contraindicated in a particular individual infected by Covid 19, so it is more inclined to a case to case basis.
There are multiple studies showing that heartburn medication (PPIs) significantly increase the risk of infection. This one below says the contrary, but also says thay PPI treatment of infected patients results in 79% more chances of severe outcome.
https://gut.bmj.com/content/early/2020/07/30/gutjnl-2020-322248
Hydroxichloroquine was a very disputed drug, as well as aspirin. There are several studies out there you might wanna look into.
Hope this helps.
Foods with high sugar and salt sjould be avoided.
With respect to drugs , drugs which can reduce the immunity should be avoided