Hi doctor! I was infected with parasites of dogs and cats, I went to the doctor and took medicine, I don't know if it was because I took too much medicine for worms, but after taking it for 7 days, my stomach hurt. Since more than 1 month now, the stomach has not been cured, must also stop taking anti-parasitic drugs, but too much itching, fatigue, pressure. Ask the doctor, is it okay to have an itchy stomach and fatigue after taking anti-parasitic drugs? And is there a way to cure the parasites without taking it orally? Looking forward to your advice, thank you doctor!