Progesterone may cause weight gain. WebMD lists weight gain as one of the side effects of taking FDA-approved progesterone prescription products. It can also cause fluid retention and swelling, which can contribute to we... More » Health Medications & Vitamins Side Effects

According to HowStuffWorks, progesterone cream is applied to the skin and absorbed into the body to mimic the behavior of the hormone as it would naturally occur. This is intended to help menopausal women whose progester... More » Health Medications & Vitamins

Progesterone suppositories are mainly prescribed and used as part of a fertility treatment program to help women who are having hormonal problems. Since fertility treatments for women tend to decrease the progesterone le... More » Health Medications & Vitamins Vitamins & Supplements

Using metformin to treat polycystic ovary syndrome may cause weight fluctuations because metformin helps the body to use insulin more efficiently. It also decreases the amount of sugar manufactured by the liver and decre... More » Health Medications & Vitamins Side Effects

The medication Levothyroxine is known to cause both weight gain and weight loss, but it is more common for the medication to cause the patient to lose weight, according to the website Drugs. Taking normal doses of Levoth... More » Health Medications & Vitamins Side Effects

Both weight gain and weight loss are metabolic side effects listed for Nexium on RxList. People looking to use an acid reducer that does not cause weight gain should talk with their doctor. More » Health Medications & Vitamins Side Effects

Weight gain is an extremely rare side effect of Celexa, and while it does happen, it should not be expected for most patients, according to WebMD. Weight loss is a much more common side effect than weight gain for Celexa... More » Health Medications & Vitamins Side Effects