Talk to Gastroenterologist on Chronic Sinusitis, Acidity & Constipation

I was prescribed Silicea 0/1(20drops×2 times a day) for 15 days for chronic sinusitis accompanied by dry nose, pain in root of nose, cheek bones & dental gums. I feel congested most of the time. I am constipated & hyper acidity prevailed. The medication didn't benefit me well after taking for 10 days and reconsulted the Doctor. Now, I have been prescribed Silicea IM (5 drops×3times a day) . Can medicines with higher dosage cause drowsiness, lethargy and difficulty?