These two products do it nicely

I have used it many times, and it has saved performance night for many of my students.Do not smoke.  To flush out a cold completely in three days or less, buy Alkalol. Nod your head. Make it fun, but do not speak to everything!8. Write notes. I recommend Ricola and Slippery Elm lozenges. Take a deep breath in over your chords, and yawn to break throat tension. These two products do it nicely. Avoid ice. It is the best. Try to eat bland food, not heavy spices. Don't sing loudly to open your chords. Elevate your head when you sleep. Waste no time. It is an older remedy you can purchase from a pharmacist. 

It will help keep your breathing passages open and in tu will keep your chords clear of hazardous phlegm that would otherwise kick upwards onto your chords. Dianne offers keynote speeches, group workshops, and sees clients one-on-one in the Los Angeles area or on the phone. No Whispering. No throat clearing. When vocal chords feel compromised, by cold, smoke or singing too loudly, they produce more mucus to protect themselves. If you need help finding a vocal therapist please contact me on my website and I will direct you. As a veteran Broadway stage performer, Dianne knows how mastering public speaking & performing can catapult your career, and her expert coaching makes your process a fun, meaningful exploration into your best self. ALWAYS drink water. Nobody likes to feel like this when they sing!

When you are digesting in your sleep, sometimes stomach acid is kicked up into your throat and it causes some minor to major buing. Your chords need to heal and be soothed 24-7 after an illness. If you have been to a doctor and he or she has diagnosed nodes or lesions on your chords, get help immediately. Do you love your voice? Do not smoke. You will find the need to clear your throat will lessen when you get in the habit of deep breathing instead of clearing the throat. Find one of the following for daytime use: AYR, NASAL, or SALINEX. You can also try Black Currant Pastilles if you are allergic to the mint in Ricola. These are sprays you can use in each nostril 3-6 times a day.4. You just want to lubricate and calm the chords. Use a nasal wash daily.

It will flush out your cold, and will take gunk off your chords when you have to sing a show.  Breathing will stay easy and you will feel the need to cough less. VOICE REST. If you have to speak, do it in as normal a voice as you can manage. Listen more. Avoid food 3-4 hours before going to sleep. Find alteative ways to communicate. Directions are on the bottle