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Well, you should not take NyQuil and Zyrtec together.
There is a moderate drug interaction between them.
If you take them together, it can cause side effects such as dizziness, drowsiness, and difficulty concentrating.
To control cough,please take the following steps:
1. Gargle with hot, saline water - mix 2 teaspoonfuls of salt in 1 glass of hot water and gargle thrice daily.
2. Steam inhalation - Take a bowl of hot water, and put 2 tsf of salt in it. You can also put menthol in it if you have some. Inhale the steam that rises from the water.
3. Drink a glass of warm lemon juice daily.
4. You can suck on hard sweets - the saliva trickling down the throat will be soothing.
5. Take Tylenol for pain.
Also,continue with Nyquil.
In case, symptoms doesn't improve in next 3-4 days, than please see your primary doctor.
Hope this helped
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