Verified answer

No, none of them suppress the immune system. They are for nausea, anxiety/depression, allergies, and stomach acid reduction. Stopping them will not decrease your chance of getting a cold. Just stay away from people who are sick and wash your hands thoroughly. That should brings the odds down of you getting ill.

Ranitidine could increase your risk of contracting pneumonia.

Phenergan is not known to suppress the immune system however caution should be used by those who have suppressed immune systems and are taking it.

In a Canadian study, doxepin was linked to increased risk for breast cancer in women. Cancers are the result of something awry in the immune system.

There is no indication that razene suppresses the immune system.

All of this said, it is never a bad idea to use an effective, natural immune booster to keep you healthy. Try Immune Alert, made from an all-natural extract from baker's yeast called beta glucan that is proven to keep your immune system healthy and help fight colds and flu. My family takes it and swears by it.

Go to www.immunealert.com and get a free trial (you pay for shipping and handling).