Almindelige bivirkninger (forekommer hos op til 1 ud af 10 patienter): - fald i antallet af celler, der får blodet til at størkne, kaldet blodplader (hvilket kan resultere i, at det er lettere at få blå mærker og spontane blødninger), fald i visse hvide blodlegemer kaldet lymfocytter (som hjælper med at bekæmpe infektion), nedsættelse af skjoldbruskkirtlens funktion (hvilket kan gøre dig træt, depressiv, forøge din følsomhed for kulde samt andre symptomer), forhøjet sukker eller urinsyre (som ved urinsur gigt) i blodet, lavt calciumniveau i blodet, alvorlig anæmi, - svampe- eller bakterieinfektioner, gråd, agitation, hukommelsestab eller nedsat hukommelse, nervøsitet, unormal adfærd, aggressiv opførsel, vrede, forvirring, manglende interesse, mental lidelse, humørændringer, unormale drømme, ønske om at skade dig selv, følelse af søvnighed, søvnbesvær, manglende interesse i sex eller manglende mulighed for at gennemføre sex, svimmelhed (følelse af at dreje rundt), - uklart eller unormalt syn, øjenirritation eller -smerte eller -infektion, tørre eller tårefyldte øjne, ændringer i din hørelse eller stemme, ringen for ørerne, øreinfektion, ørepine, forkølelsessår (herpes simplex), smagsforstyrrelser, tab af smagssans, blødende tandkød eller sår i munden, brændende fornemmelse på tungen, ømhed i tungen, tandkødsbetændelse, tandproblem, migræne, luftvejsinfektioner, bihulebetændelse, næseblod, hoste uden slim, hurtig eller besværlig vejrtrækning, tilstoppet eller løbende næse, tørst, tandlidelse, - hjertemislyd (unormal lyd af hjerteslag), brystsmerte eller ubehag i brystet, svaghedsfornemmelse, utilpashed, rødme, øget svedtendens, ubehag ved varme og overdreven svedtendens, lavt eller højt blodtryk, hjertebanken, hurtig hjerterytme, - oppustethed, forstoppelse, fordøjelsesbesvær, luft fra tarmene, øget appetit, irritabel tyktarm, irritation i prostatakirtlen, gulsot (gul hud), løse afføringer, smerte på højre side af din ribben, forstørret lever, maveonde, hyppig vandladningstrang, større vandladning end sædvanlig, urinvejsinfektion, unormal urin, 
Commonly reported side effects (may affect up to 1 in 10 people): decrease in blood clotting cells called platelets that may result in easy bruising and spontaneous bleeding, decrease in certain white blood cells called lymphocytes that help fight infection, decrease in thyroid gland activity (which may make you feel tired, depressed, increase your sensitivity to cold and other symptoms), excess of sugar or uric acid (as in gout) in the blood, low calcium level in the blood, severe anaemia, fungal or bacterial infections, crying, agitation, amnesia, memory impaired, nervousness, abnormal behaviour, aggressive behaviour, anger, feeling confused, lack of interest, mental disorder, mood changes, unusual dreams, wanting to harm yourself, feeling sleepy, trouble sleeping, lack of interest in sex or inability to perform, vertigo (spinning feeling), blurred or abnormal vision, eye irritation or pain or infection, dry or teary eyes, changes in your hearing or voice, ringing in ears, ear infection, earache, cold sores (herpes simplex), change in taste, taste loss, bleeding gums or sores in mouth, burning sensation on tongue, sore tongue, inflamed gums, tooth problem, migraine, respiratory infections, sinusitis, nose bleed, nonproductive cough, rapid or difficult breathing, stuffy or runny nose, thirst, tooth disorder, cardiac murmur (abnormal heart beat sounds), chest pain or discomfort, feeling faint, feeling unwell, flushing, increased sweating, heat intolerance and excessive sweating, low or high blood pressure, palpitations (pounding heart beat), rapid heart rate, bloating, constipation, indigestion intestinal gas (flatus), increased appetite, irritated colon, irritation of prostate gland, jaundice (yellow skin), loose stools, pain on the right side around your ribs, enlarged liver, stomach upset, frequent need to urinate, passing more urine than usual, urinary tract infection, abnormal urine, difficult, irregular, or no menstrual period, abnormally heavy and prolonged menstrual periods, painful menstruation, disorder of ovary or vagina, breast pain, erectile problem, abnormal hair texture, acne, arthritis, bruising, eczema (inflamed, red, itchy and dryness of the skin with possible oozing lesions), hives, increased or decreased sensitivity to touch, nail disorder, muscle spasms, numbness or tingling feeling, limb pain, pain in joints, shaky hands, psoriasis, puffy or swollen hands and ankles, sensitivity to sunlight, rash with raised spotted lesions, , redness of skin or skin disorder, swollen face, swollen glands (swollen lymph nodes), tense muscles, tumour (unspecified), unsteady when walking, water impairment.