Imusporin 100 Capsule may cause side effects such as headache, diarrhea, heartburn, increased hair growth on the face, arms, or back, growth of extra tissue on the gums, acne, flushing, and uncontrollable shaking of a part of your body. You may also experience burning or tingling sensation in the hands, arms, feet, or legs, muscle or joint pain, cramps, pain or pressure in the face, ear problems, breast enlargement in men, depression and difficulty falling asleep or staying asleep.