This CLEO script allows you to buy first aid kits in all hospitals in the state of San Andreas. To buy a first aid kit, stand on the red marker near the hospital and press the "Y" key. The cost of one first-aid kit is $150 (the price will increase up to $400 depending on the progress in the game). Also, hospital icons have been added to the map.
One first-aid kit restores 100 health points. In total, a player can carry up to 3 first-aid kits with him (I purposely made only 3, so as not to ruin the game balance too much)
Controls: Y - Buy first aid kit X - View number of health kits "+" key - use first aid kit
UPD: There are 2 download links and 2 script options. The first one is with red markers. The second - without them