A boring layover can be a pain, but getting sick at an airport terminal can be even worse.

With cases like allergic reactions, dehydration or even heart attacks affecting travelers, having medical clinics at the airport might seem like a no-brainer.

Various walk-in medical clinics can be found in some major airports in North America. If you need some medical care on the fly, you may be able to find Emergency Physicians, Occupational Medicine Physicians, Nurse Practitioners and Radiology Technicians during your next layover.

Besides medical care, some offer travel first-aid kits and can bring you up to date on required immunizations that you may have overlooked when planning your trip.

Passengers too ill to continue their trip can often get a note from the clinic to present to their airline so they can stay on the ground. Some offer pharmacy services if you forgot to fill a prescription in your dash to the airport too!

Here Is A Handy List Of Airport Medical Clinics In North America:

1. Primecare Health at Calgary International Airport

Same Day Walk-in Appointments services include:

• Complete Family Care

• Physical Therapy

• Massage Therapy

• Health/Fitness Assessments

• Chronic Disease Management

• Seniors/Elder Care

• Travel Clinics

Location: Pre-Security, Departures

Hours: Monday-Friday, 9 a.m.-5 p.m.

Phone: 587- 317- 9444

2. McCarran Medical Clinic & Pharmacy, Las Vegas

Providing services to airport travelers and employees including vaccinations, screening tests, and basic medical care to treat a variety of common symptoms. Now accepting most major insurances.

Location: Terminal 1, A/B Gates next to the Wells Fargo bank

Hours: Monday, Tuesday, Thursday, Friday, Sunday, 9 a.m.-6p.m. Wednesday, 9 a.m.-4 p.m. Saturday, 9 a.m.-2 p.m.

Phone: 702-261-6707

READ MORE: What to Eat and Avoid on an Airplane

3. SFO Medical Clinic, San Francisco

The SFO Medical Clinic provides travel medicine, urgent care, immigration physicals and occupational health services.

Location: International Terminal Main Hall, on the Boarding Area A side. Departures/Ticketing Level, Pre-security

Hours: Monday-Friday, 7 a.m.-7 p.m. Saturday, 9 a.m.-4 p.m.

Phone: 650-821-5600

4. O’Hare Urgent Care Clinic, University Of Illinois Hospital & Health Sciences System

Passengers in need of urgent medical care while at O’Hare International Airport can visit the O’Hare Urgent Care Clinic. The clinic is affiliated with the University of Illinois Hospital and Health Science System. No appointment is necessary, and most insurance is accepted.

Location: Terminal 2 on the ticketing level, past the security checkpoint

Hours: Monday-Friday, 8 a.m.-5 p.m. Weekends and holidays, 9 a.m.-5 p.m.

Phone: 773-894- 5100

5. Vancouver Airport Medical Clinic

The Vancouver airport medical clinic offers primary, family and specialized care for passengers and the airport community. Its doctors and health professionals offer travel medicine, physiotherapy, podiatry, acute injury management and specialized aviation and corporate health services. It’s also conveniently located next to a full-service pharmacy.

Location: Domestic, before security, Level 1

Hours: Monday-Friday, 8 a.m.-6 p.m.

Phone: 604-207-5100

This blog originally appeared on Vane's website.