Silphen

Do not use with any other product containing diphenhydramine, even one used on skin

Ask a doctor before use if you have

• persistent or chronic cough such as occurs with smoking, asthma, or emphysema
•  cough is accompanied by excessive phlegm (mucus)
• breathing problem such as emphysema or chronic bronchitis
• glaucoma
• trouble urinating due to an enlarged prostate gland

if symptoms last for more than 1 week or recurred or accompanied by fever, rash, headache

if you are  taking tranquilizers or sedatives