4-hours is not a problem.
A PBJ sandwich can stay unrefrigerated for about 2 hours before it becomes unsafe to eat due to the risk of bacteria growth.
Refrigerated food can only go unrefrigerated for four hours.
Sliced tomatoes can sit out at room temperature for up to 2 hours before they become unsafe to eat. After that time, bacteria can start to grow, increasing the risk of foodborne illness. It's best to refrigerate sliced tomatoes if they won't be eaten within 2 hours.
No food should go unrefrigerated for more than two hours, including hot dogs. It's best to refrigerated them as soon as possible. If they are left out longer, they should be thrown out, as they may be unsafe to eat.
The pastrami may not be safe and should be thrown out.
Milk can last unrefrigerated for about 2 hours before it spoils.
for 2 hours
Unrefrigerated milk typically lasts for about two hours before it spoils.
that happened to me... the pharmacist told me that if it has been unrefrigerated for more than 12 hours, it has lost effectiveness and a new prescription is needed. Unrefrigerated for less than 12 hours he said would still be OK.
They are considered safe, unrefrigerated, after no more than 2 hours. But this must depend on what the eggs are made of. A chocolate egg will be safe unrefrigerated for years.
several hours
That depends how long they have been unrefrigerated. If they've been sitting out for more than 2 hours, I wouldn't use them.