

By sharing this information with them, you may help prevent possible interactions. As a result, Synthroid can work to be effective for treating your condition.īefore you start treatment with Synthroid, tell your doctor and pharmacist which supplements, herbs, and vitamins you take. This should help prevent iron or calcium from affecting the level of Synthroid in your body. This may make Synthroid less effective than usual.ĭue to this risk, you should not take iron or calcium supplements at least 4 hours before or 4 hours after taking Synthroid. If either supplement is taken with Synthroid, it could decrease the level of the drug in your body. These include iron and calcium supplements. Synthroid interactions with supplementsĬertain supplements may interact with Synthroid. Synthroid may have other interactions, such as with supplements, foods, vaccines, or even lab tests. This should help prevent orlistat from attaching to Synthroid in the body, allowing Synthroid to be effective for treating your condition. If your doctor prescribes Synthroid with orlistat, you’ll take orlistat at least 4 hours before or 4 hours after taking Synthroid.

They can advise you on whether it’s safe to take these medications together. Before starting Synthroid treatment, be sure to tell your doctor if you’re taking orlistat. This lowers the level of Synthroid in your body, which prevents Synthroid from working as well as it usually does. When taken together, orlistat may attach to Synthroid and prevent the body from absorbing Synthroid. Synthroid is a synthetic version of a certain thyroid hormone found naturally in the body. Taking Synthroid with orlistat could make Synthroid less effective than usual. Orlistat (Alli, Xenical) is a medication used for weight loss. For details about Synthroid’s dosage, see this article.

If it does, your doctor may prescribe a higher dosage of Synthroid than usual. They’ll help determine whether it contains estrogen. Before taking Synthroid, tell your doctor if you take oral birth control. Here are examples of oral birth control drugs that may interact with Synthroid: As a result, Synthroid may not work as well as it usually does.Įxamples of oral birth control drugs. This keeps the level of the thyroid hormone in your body low. Increased levels of these proteins can prevent the body from absorbing Synthroid. Taking oral birth control that contains estrogen can increase the level of certain proteins that attach to the thyroid hormone in the body. Taking Synthroid with birth control that contains estrogen could make Synthroid less effective than usual. Synthroid may interact with oral birth control that contains a hormone called estrogen. Oral birth control is medication taken by mouth to help prevent pregnancy. This should help prevent the antacid from attaching to Synthroid in your body, allowing Synthroid to be effective for treating your condition. Be sure to take Synthroid at least 4 hours before or 4 hours after taking an antacid.

When taken together, the antacid may attach to Synthroid and prevent the body from absorbing Synthroid. Taking Synthroid with an antacid could make Synthroid less effective than usual. AntacidsĪntacids are used to ease symptoms of conditions such as heartburn or indigestion. Here’s a closer look at certain drug interactions of Synthroid. * For more information about the side effects of Synthroid, see this article. carbamazepine (Carbatrol, Epitol, Tegretol, others)Ĭan make Synthroid less effective than usual, or increase the risk of side effects from Synthroid*Ĭan make digoxin less effective than usualĬan increase the risk of side effects from ketamine.ethinyl estradiol/norgestimate (Estarylla, Sprintec, others).ethinyl estradiol/norethindrone (Aranelle, Gildagia, others).sodium polystyrene sulfonate (SPS, Kionex, Kalexate).Can increase the effect of TCAs and Synthroid*Ĭan make beta-blockers less effective than usualĬan make diabetes drugs less effective than usualĬan make Synthroid less effective than usual or increase the risk of side effects from Synthroid*Ĭan make Synthroid less effective than usual
