You’re allowed to take the medicines with you that you need to sustain you for your flight. Anything else should go in your hold baggage.
Anything under 100ml should be put in the transparent, re-sealable plastic bag with you other liquids.
Even though there is no limit on the amount of medicine you can take through security, it will go through additional security screening. You’ll be asked to prove that you need the medicine.
If you need to bring things like insulin and needles, or asthma inhalers, you are able to do so, but only the amount you need for your flight (put the rest in your hold baggage). Again, you will be asked to prove that you need it.
Bringing a wheelchair or walking frame through security is fine and, like all items, it will be searched thoroughly. Check with your airline about restrictions on taking it on your flight.
Should you need to bring medical equipment like heart rate monitors, that’s also fine, provided it meets the restrictions on size. Any equipment like this is subject to security screening.