Cephalexin Monohydrate and stomach pain

dry mouth, burning of the eyes, headache, dizzy,weak, loss of appetite,back spasm,diarrhea. I have been taking cephalexin monohydrate 500my for 3 days, cramping, stomach pain

I have been taking Cephalexin for about 6 days now and have experienced some stomach pain and considerable constipation. I didn't see constipation listed on the fact sheet from the pharmacy or on most websites...although I have now found some evidence that this may be the case. I'd hope that this could be better documented for all..Am considering stopping my treatment with this now.

After a simple operation I have these symptoms after taking Cephalexin: nausea, vomiting, stomach pain, stools that are watery, pale or yellowed skin, dark colored urine, fever, mental confusion, weakness
dizziness, tired feeling AND vaginal discharge.

i've been taking this medication for about 4 days, i have been extremely irritable, a bit itchy with a slight rash and having nightmares where i wake up in a panic or yelling waking myself up, i've also has stomach pain, is this normal?
i am taking the meds for an infection in my mouth.